For some strange unbeknown reason my contact form has just stopped working in that it no longer submits any of the form details to the email address I have set up in the script.

The contact form does re-direct to the thanks.htm file once the approapriate field data has been completed and then submitted, its just it ends at that point..!

I tested the PHP / contact form on several occasions whilst live and on every occasion I had the form details come through to my email account, so Im at a loss as to why it has just stopped ?

My code for the PHP and HTML is as follows should anyone anyone be kind enough to look at it : (Domain is also www.bfdesigns.co.uk)

PHP Code:
<?php
/* Set e-mail recipient */
$myemail  "ben@bfdesigns.co.uk";

$company  = ($_POST['company']);
$firstname = ($_POST['firstname']);
$email    =($_POST['email']);
$enquiry =($_POST['enquiry']);
$thanksurl "http://bfdesigns.co.uk/thanks.htm" ;
$errorurl "http://bfdesigns.co.uk/error.html" ;

/*Redirects the user to the error page if JS is disabled and the form is submitted*/
if(empty($firstname))
{
header('Location: error.html');
exit();
}else
{
/* Redirects the visitor to the thanks page */
header('Location: thanks.htm');
exit();
}

/* Prepare the message for the e-mail */
$message "You have a new Web design enquiry from:

Company name: 
$company
Client name: 
$firstname
Clients e-mail: 
$email
Clients message: 
$enquiry
End of message
"
;

/* Sends the message using mail() function */
mail($myemail$email$message);

?>
HTML Code:
<form action="contact.php" method="post" name="contactForm" onsubmit="return validateForm()">
					<fieldset>
					<p><span>*</span> Must be completed to submit the form</p>
						<label>Company:</label>
							<input type="text" name="company"/>
								<label id="completeField"><span>*</span> Name:</label>
									<input type="text" name="firstname" id="firstname"/>
										<label>Email:</label>
											<input type="text" name="email"/>
												<label>Enquiry:</label>
													<textarea name="enquiry" rows="4" cols="10"></textarea>
														<input type="submit" value="Submit" id="submit" />
					</fieldset>
				</form>