1) That error "Notice: Use of undefined constant on - assumed 'on' " will only occur when there is no single quote around on in the ini_set command:
Delete the page on the server and reupload to make sure your changes are making it up to the server.
2) I still some some file referances in your file tha twill cause problems and need to be fixed:
<form action="file:///website/fuel09-Manager/jobs_Insert.php" method="post" enctype="multipart/form-data" name="WADAInsertForm" id="WADAInsertForm">
<input type="image" name="Insert" id="Insert" value="Insert" alt="Insert" src="file:///website/fuel09-Manager/WA_DataAssist/images/Slate/Elemental_insert.gif" />
3) For Debugging, temporarily change line 133:
$WA_redirectURL = "jobs_Detail.php";
$WA_redirectURL = "";
so that no redirect will take place.
4) On the bindings panel, expand the WA Global status binding group and bind the debug info binding to the page, this will help us in finding the cause of the problem.