Hey,

I am getting an error on one of my website pages. If you take a look at this link:-

http://www.judgethejob.com/vinny/join-us/

You will i get this error:-

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /domains/judgethejob.com/http/vinny/join-us/index.php:11) in /domains/judgethejob.com/http/vinny/join-us/index.php on line 204
Now, i have the following code and i have ob_start which i thought would prevent this error..?

PHP Code:
         <?php
            session_start
();
            
ob_start();
            
            if (isset(
$_POST['btn-submit'])) 
            {     
                include(
"../conn.php");
                
                
$emailcheck $_POST['txt_email'];
                
                
$email_check mysql_query("SELECT email FROM tbl_members WHERE email = '$emailcheck'") or die(mysql_error());
                
$email_check2 mysql_num_rows($email_check);
                                
                if (
$email_check2 != 0) {
                echo 
"<p>Sorry, the email '".$_POST['txt_email']."' is already in use. <a href='javascript:history.go(-1)'> Return</a> to amend.</p>";
                }
                else 
                {
                
$insert "INSERT INTO tbl_members(username, password, email, gender, postcode, DOB, education, date_added) VALUES 
                (
                                // Insert here...
                )"
;
                
$add_member mysql_query($insert);
                
                
$from "ibrar@freemanholland.com";
                
$headers "From: $from";
                
$to $_POST['txt_email'];
                
$subject "This is a test";
                
$body "Thank you for registering with Judge the Job. 
                One of our team will contact you within 24 hours about 
                your registration to confirm your details. If ok we will 
                make your account active and you will be able to place your 
                offer immediately. 
                
                Meanwhile please keep your login details safe: E-mail: "
.$_POST['txt_email']." Password: ".$_POST['txt_password']."";
                
//$body = "Thank you for registering on our website. Your login details are as follows:- Email Address: ".$_POST['txt_email']." and Username: ".$_POST['txt_username']."";
                
                
if (mail($to$subject$body$headers)) {
                  echo(
"<p>Many thanks for registering – one of our team will contact you within 24 hours about your registration to confirm your details. If ok we will make your account active and you will be able to place your offer immediately.</p>");
                 } else {
                  echo(
"<p>Message delivery failed... please try again later, or contact the administrator.</p>");
                 }
                }    
            }
How can i prevent this?

Regards