Your form action is set to:
action="RequestforQuote.php<?php echo $row_WADAProd['ID']; ?>"
I think your form action should probably be blank.
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.