I'll bet the recordset is blank when the form posts because it doesnt have the id needed to populate it.
change the form tag to:
<form class="Simple_Simple" id="EmailDetailInformation_Simple_Simple" name="EmailDetailInformation_Simple_Simple" method="post" action="<?php echo $_SERVER["PHP_SELF"]; ?><?php echo (isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] != "")?"?".$_SERVER["QUERY_STRING"]:""; ?>">