Thank you for your help with this.
I have modified the code. When the form is submitted it continues to go back to the contact.php page. There are php notices:
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent in WAVT_ValidatedForm_PHP.php on line 3
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at WAVT_ValidatedForm_PHP.php:3) in WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php on line 3
Warning: Cannot modify header information - headers already sent by (output started at WAVT_ValidatedForm_PHP.php:3) in contact.php on line 34


