Checkout page binding issue

Sorry - where should die statement go?

Nothing of MM_UserGroup seems to work.

Here's the login page:

<?php require_once('Connections/connHCHQ.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}

$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
$_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['emailAddress'])) {
$loginUsername=$_POST['emailAddress'];
$password=$_POST['password'];
$MM_fldUserAuthorization = "";
$MM_redirectLoginSuccess = "checkout.php";
$MM_redirectLoginFailed = "customer_login.php?failed=true";
$MM_redirecttoReferrer = false;
mysql_select_db($database_connHCHQ, $connHCHQ);

$LoginRS__query=sprintf("SELECT UserEmail, Password1 FROM users WHERE UserEmail=%s AND Password1=%s",
GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));

$LoginRS = mysql_query($LoginRS__query, $connHCHQ) or die(mysql_error());
$loginFoundUser = mysql_num_rows($LoginRS);
if ($loginFoundUser) {
$loginStrGroup = "";

//declare two session variables and assign them
$_SESSION['MM_Username'] = $loginUsername;
$_SESSION['MM_UserGroup'] = $loginStrGroup;

if (isset($_SESSION['PrevUrl']) && false) {
$MM_redirectLoginSuccess = $_SESSION['PrevUrl'];
}
header("Location: " . $MM_redirectLoginSuccess );
}
else {
header("Location: ". $MM_redirectLoginFailed );
}
}
?>

and it's form:

<form action="<?php echo $loginFormAction; ?>" method="POST" name="customerLogin" class="user">
<p><label>Email address:</label><input name="emailAddress" type="text" /></p>
<p><label>Password:</label><input name="password" type="password" /></p>
<p class="submit">
<label>
<input name="Login" type="image" id="Login" value="Login to my account" src="images/login-button.png" />
</label>
</p>
</form>