on the TDetails.php page, change this code:
<a href="interMemberEmail.php?id=<?php echo(isset($_GET['id'])?$_GET['id']:""); ?>
<p><a href="InterMemberEmail.php">Click Here</a></p></td>
to:
<p><a href="InterMemberEmail.php?ID=<?php echo(isset($_GET['ID'])?$_GET['ID']:""); ?>">Click Here</a></p></td>
and on the InterMemberEmail.php page, change
<form class="NewFromBlank_Default" id="SimpleContact_NewFromBlank_Default" name="SimpleContact_NewFromBlank_Default" method="post" action="<?php echo $_SERVER["PHP_SELF"]; ?>">
to
<form class="NewFromBlank_Default" id="SimpleContact_NewFromBlank_Default" name="SimpleContact_NewFromBlank_Default" method="post" action="<?php echo ($_SERVER["PHP_SELF"].(isset($_SERVER["QUERY_STRING"])?"?".htmlentities($_SERVER["QUERY_STRING"]):""));?>">