hmmmm, that is strange.
lets try changing line 25 to:
die(WA_DFP_AllUploadsDebug());
$WA_MailObject = WAUE_AddAttachment($WA_MailObject,"".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"] ."".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"] ."");
also add:
<?php
error_reporting(E_ALL);
ini_set('display_errors','on');
?>
at line 1 of the test1.php page.