OK, If the image is not uploading at all, there a few steps to take for debugging.
First, make sure that there are no server behavior that are redirecting to another page. After trying the image upload, we need to stay on the same page to be able to debug what is wrong.
Once the page is no longer redirecting, go to the bindings panel. Expand the Digital File Pro Global Status group and bind the debug info to the page. Post back what the debug info says after trying to upload.
also, to make sure that there is not a PHP error occurring, add the following at line 1:
<?php
error_reporting(E_ALL);
ini_set('display_errors','on');
?>