on the results page, add a form to the results display. It will only need to have a hidden form element and a submit button.
set the name of the form to use the ID column from your recordset and leave the action blank:
<form name="download_<?php echo $row_rsName["ID"]; ?>" id="download_<?php echo $row_rsName["ID"]; ?>" method="POST" action="download_<?php echo $row_rsName["ID"]; ?>">
in the hidden form element, set the init value to the file name column from the recordset.
Add the Digital File Pro Download file server behavior. Set the folder to the same folder used as the upload location, click the lightning bolt next to file name and select the hidden form element.