the action of the form on the contactTest.php page is to post to the contact.php page:
<form class="custom" id="contact" name="contact" method="post" action="contact.php">
on the contact.php page, the following line is commented out:
<?php /*?><?php require_once("webassist/email/mail_php.php"); ?><?php */ ?>
i removed the comment to fix the error.