Its version 3.0.2
On another page it works using this:
//Attachment Entries
$WA_MailObject = WAUE_AddAttachment($WA_MailObject,"client_art/".((isset($_POST["clientFileName"]))?$_POST["clientFileName"]:"") ."");
On this page I'm just getting the file name from a different place. Of course I tried a variation of this but it didnt work.