sorry, I meant to write it out like this:
"successRedirect" => "users_Profile.php?" . "DSerial=" . $row_rsDispatches['DSerial'];
A colleague pointed out that if you just change the action of the form to this:
action="<?php echo $_SERVER["PHP_SELF"]; ?><?php echo (isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] != "")?"?".$_SERVER["QUERY_STRING"]:""; ?>"
That should get you on your way.