I have an issue where a form is not submitting and it seems that the PHP version might have been updated which could be causing this. The current version of PHP is 5.1.6 and all of the sudden the form stopped working. Could someone please review and let me know what could be causing this?

This is the page that holds the actual form being filled out:

PHP Code:
<form action="contact-success.php" method="post" onSubmit="MM_validateForm('First_Name','','R','Last_Name','','R','Email','','RisEmail');return document.MM_returnValue">
                          <
table cellpadding="0" cellspacing="0" border="0">
                            <
tr>
                              <
td>Are you interested in:</td>
                              <
td style="padding-left:10px">
                                <
input type="checkbox" name="Interests[]" value="Solo Direct Mail">Solo Direct Mail (USA Only)<br>
                                <
input type="checkbox" name="Interests[]" value="Mailing Lists">Mailing Lists<br>
                                <
input type="checkbox" name="Interests[]" value="Print Brokerage">Print Brokerage<br>
                                <
input type="checkbox" name="Interests[]" value="Pay Per Click Campaigns">Pay Per Click Campaigns<br>
                                <
input type="checkbox" name="Interests[]" value="Search Engine Optimization">Search Engine Optimization<br>
                                <
input type="checkbox" name="Interests[]" value="Search Engine Marketing">Search Engine Marketing<br>
                                <
input type="checkbox" name="Interests[]" value="Website Design">Website Design<br>
                              </
td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>* First Name:</td>
                              <
td style="padding-left:10px"><input type="text" name="First_Name" id="First_Name"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>* Last Name:</td>
                              <
td style="padding-left:10px"><input type="text" name="Last_Name" id="Last_Name"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>* E-mail:</td>
                              <
td style="padding-left:10px"><input type="text" name="Email" id="Email"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Title:</td>
                              <
td style="padding-left:10px"><input type="text" name="Title" id="Title"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Company Name:</td>
                              <
td style="padding-left:10px"><input type="text" name="Company_Name" id="Company_Name"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Street Address:</td>
                              <
td style="padding-left:10px"><input type="text" name="Street_Address"id="Street_Address"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>City:</td>
                              <
td style="padding-left:10px"><input type="text" name="City" id="City"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>State:</td>
                              <
td style="padding-left:10px">
                                <
select name="State" id="State">
                                  <
option value="Alabama">Alabama</option>
                                  <
option value="Alaska">Alaska</option>
                                  <
option value="Arizona">Arizona</option>
                                  <
option value="Arkansas">Arkansas</option>
                                  <
option value="California">California</option>
                                  <
option value="Colorado">Colorado</option>
                                  <
option value="Connecticut">Connecticut</option>
                                  <
option value="Delaware">Delaware</option>
                                  <
option value="District of Columbia">District of Columbia</option>
                                  <
option value="Florida">Florida</option>
                                  <
option value="Georgia">Georgia</option>
                                  <
option value="Hawaii">Hawaii</option>
                                  <
option value="Idaho">Idaho</option>
                                  <
option value="Illinois">Illinois</option>
                                  <
option value="Indiana">Indiana</option>
                                  <
option value="Iowa">Iowa</option>
                                  <
option value="Kansas">Kansas</option>
                                  <
option value="Kentucky">Kentucky</option>
                                  <
option value="Louisiana">Louisiana</option>
                                  <
option value="Maine">Maine</option>
                                  <
option value="Maryland">Maryland</option>
                                  <
option value="Massachusetts">Massachusetts</option>
                                  <
option value="Michigan">Michigan</option>
                                  <
option value="Minnesota">Minnesota</option>
                                  <
option value="Mississippi">Mississippi</option>
                                  <
option value="Missouri">Missouri</option>
                                  <
option value="Montana">Montana</option>
                                  <
option value="Nebraska">Nebraska</option>
                                  <
option value="Nevada">Nevada</option>
                                  <
option value="New Hampshire">New Hampshire</option>
                                  <
option value="New Jersey">New Jersey</option>
                                  <
option value="New Mexico">New Mexico</option>
                                  <
option value="New York">New York</option>
                                  <
option value="North Carolina">North Carolina</option>
                                  <
option value="North Dakota">North Dakota</option>
                                  <
option value="Ohio">Ohio</option>
                                  <
option value="Oklahoma">Oklahoma</option>
                                  <
option value="Oregon">Oregon</option>
                                  <
option value="Pennsylvania">Pennsylvania</option>
                                  <
option value="Rhode Island">Rhode Island</option>
                                  <
option value="South Carolina">South Carolina</option>
                                  <
option value="South Dakota">South Dakota</option>
                                  <
option value="Tennessee">Tennessee</option>
                                  <
option value="Texas">Texas</option>
                                  <
option value="Utah">Utah</option>
                                  <
option value="Vermont">Vermont</option>
                                  <
option value="Virginia">Virginia</option>
                                  <
option value="Washington">Washington</option>
                                  <
option value="West Virginia">West Virginia</option>
                                  <
option value="Wisconsin">Wisconsin</option>
                                  <
option value="Wyoming">Wyoming</option>
                                </
select>
                              </
td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Zip:</td>
                              <
td style="padding-left:10px"><input type="text" name="Zip" id="Zip"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Country:</td>
                              <
td style="padding-left:10px">
                                <
select name="Country" id="Country">
                                  <
option value="USA">USA</option>
                                  <
option value="Outside of the USA">Outside of the USA</option>
                                </
select>
                              </
td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Phone:</td>
                              <
td style="padding-left:10px"><input type="text" name="Phone" id="Phone"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>Fax:</td>
                              <
td style="padding-left:10px"><input type="text" name="Fax" id="Fax"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td colspan="2">Have you ever used direct mail to market your business?</td>
                            </
tr>
                            <
tr>
                              <
td>&nbsp;</td>
                              <
td style="padding-left:10px">
                                <
input type="radio" name="Direct_Mail" value="Yes" />Yes &nbsp;
                                <
input type="radio" name="Direct_Mail" value="No" />No</td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td>If so how often?</td>
                              <
td style="padding-left:10px"><input type="text" name="Direct_Mail_Often" id="Direct_Mail_Often"></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td colspan="2">Question or Comment</td>
                            </
tr>
                            <
tr>
                              <
td colspan="2"><textarea name="Comments" id="Comments" cols="50" rows="5"></textarea></td>
                            </
tr>
                            <
tr>
                              <
td height="10" colspan="2"><img height="10" width="1" src="images/spacer.gif"></td>
                            </
tr>
                            <
tr>
                              <
td colspan="2"><input type="submit" name="Submit" value="Submit"></td>
                            </
tr>
                          </
table>
                        </
form
On the next page here is the code that processes the email:

PHP Code:
<?
foreach ($_POST['Interests'] as $intFull) {
 
$Interests .= "$intFull\r\n";
}
$First_Name $_POST['First_Name'];
$Last_Name $_POST['Last_Name'];
$Email $_POST['Email'];
$Title $_POST['Title'];
$Company_Name $_POST['Company_Name'];
$Street_Address $_POST['Street_Address'];
$City $_POST['City'];
$State $_POST['State'];
$Zip $_POST['Zip'];
$Country $_POST['Country'];
$Phone $_POST['Phone'];
$Fax $_POST['Fax'];
$Direct_Mail $_POST['Direct_Mail'];
$Direct_Mail_Often $_POST['Direct_Mail_Often'];
$Comments $_POST['Comments'];
$to  'test1@email.com' ', ';
$to .= 'test2@email.com';
$subject "Contact Request";
$body "Interested in:
$Interests
First Name: 
$First_Name
Last Name: 
$Last_Name
E-mail: 
$Email
Title: 
$Title
Company Name: 
$Company_Name
Street Address: 
$Street_Address
City: 
$City
State: 
$State
Zip: 
$Zip
Country: 
$Country
Phone: 
$Phone
Fax: 
$Fax
Used Direct Mail: 
$Direct_Mail
How Often: 
$Direct_Mail_Often
Comments: 
$Comments";
$headers 'From:' .$Email"\r\n" .
 
'BCC: test3@email.com' "\r\n" .
 
'Reply-To:' .$Email"\r\n" .
 
'X-Mailer: PHP/' phpversion();
mail($to$subject$body$headers);
?>
Obviously the email addresses have been changed. If anyone could help that would be very appreciated!