most likely, the problem is lines 1 - 2:
<?php virtual("/WA_ValidationToolkit/WAVT_Scripts_PHP.php"); ?>
<?php virtual("/WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php"); ?>
they should probably be:
<?php require_once("../WA_ValidationToolkit/WAVT_Scripts_PHP.php"); ?>
<?php require_once("../WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php"); ?>
Dreamweaver will use the virtual() function for included files if the "Create links relive to" option on the local info tab of your site definition is set to "Site". If you change this to "Document" Dreamweaver will use the require_once() function instead.