I'd debug the upload.... so add code and change:
if(isset($_POST["Update_x"])){
WA_DFP_UploadFile("WA_UploadResult1", "pictureFile", "".((isset($_POST["picture"]))?$_POST["picture"]:"") ."", "../images/members/", "".$row_WAATKmembers['lastName'] ."", "2", "[FileName]_[Increment]", "0", "true", "150", "0");
}
to:
if(isset($_POST["Update_x"])){
WA_DFP_UploadFile("WA_UploadResult1", "pictureFile", "".((isset($_POST["picture"]))?$_POST["picture"]:"") ."", "../images/members/", "".$row_WAATKmembers['lastName'] ."", "2", "[FileName]_[Increment]", "0", "true", "150", "0");
var_dump($WA_DFP_UploadStatus["WA_UploadResult1"]);
die();
}
That should tell you about the file that was uploaded including any errors.