First, lets see if the files are uploadinjg successfully.
change line 46:
$RecipientEmail = "webmaster@valleyheat.com";include("WA_Universal_Email/WAUE_application_1.php");
to:
die("File 1:".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"]."<br>file 2:".$WA_DFP_UploadStatus["WA_UploadResult2"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult2"]["serverFileName"]."<br>file 3:".$WA_DFP_UploadStatus["WA_UploadResult3"]["serverDirectory"]."".$WA_DFP_UploadStatus["WA_UploadResult3"]["serverFileName"]);
$RecipientEmail = "webmaster@valleyheat.com";include("WA_Universal_Email/WAUE_application_1.php");
This should write he names of the uploaded files to the screen, please post back the results after testing.