Most likely, the following code is in the wrong place3 on the confirm page:
<?php
require_once("WA_eCart/Adv_CO_Scripts/PP_DirectPayment_PHP.php");
?>
Add the code to line 1 of the conform page, and the error should go away.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.