SQL update

Hvorfor bliver min SQL db ikke updated med det her:
<?php

//include(connect.php);
$myServer = "dksodt0470\sqlexpress";
$myUser = "myuser";
$myPass = "pass";
$myDB = "StaffMembers";

// connection to the database
$dbhandle = mssql_connect($myServer, $myUser, $myPass) or die("Couldn't connect to SQL Server on $myServer");

// select a database to work with
$selected = mssql_select_db($myDB, $dbhandle) or die("Couldn't open database $myDB");

$res = mssql_query("UPDATE StaffLeftCompany SET MakecopyMailDB='".$_POST[Lotus]."',AS400='".$_POST[AS400]."',NewEmployee='".$_POST[PC]."',DateOfBossUpdate='".date("d.m.Y")."' WHERE SecurityCode='".$_GET['id']."'");

// close the connection
mssql_close($dbhandle);
?>

Hvis jeg bruger denne:
echo "UPDATE StaffLeftCompany SET MakecopyMailDB='".$_POST[Lotus]."',AS400='".$_POST[AS400]."',NewEmployee='".$_POST[PC]."',DateOfBossUpdate='".date("d.m.Y")."' WHERE SecurityCode='".$_GET['id']."'";

Kan jeg se at der er indhold.

Jeg er IKKE god til PHP