Problem med update af tabel

Jeg har lavet denne ½ lange kode. Det virker sådan set fint nok, den kommer ikke med fejl. Men den opdatere ikke tabellen! Den siger your table was succesfully updated, men det bliver den altså ikke. Hvad kan være problemet?


<?
session_start();
header("Cache-control: private");
require("inc/conn_inc.php");
session_checker();
?>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>

<br><br>
<?

$errors = array();
$fejl = 5;
#carbrand check
if(isset($_POST['carbrand'])) {
  if(trim($_POST['carbrand']) == '') $errors['carbrand'] = "<font color='#FF3300'>Field Carbrand is required</font>.";
  else $fejl--;
}
else $errors['carbrand'] = "*";

#carmodel check
if(isset($_POST['carmodel'])) {
  if(trim($_POST['carmodel']) == '') $errors['carmodel'] = "<font color='#FF3300'>Field Carmodel is required</font>.";
  else $fejl--;
}
else $errors['carmodel'] = "*";

#devicenumber check
if(isset($_POST['devicenumber'])) {
  if(trim($_POST['devicenumber']) == '') $errors['devicenumber'] = "<font color='#FF3300'>Field Devicenumber is required</font>.";
  else $fejl--;
}
else $errors['devicenumber'] = "*";

#unitid check
if(isset($_POST['unitid'])) {
  if(trim($_POST['unitid']) == '') $errors['unitid'] = "<font color='#FF3300'>Field Unitid is required</font>.";
  else $fejl--;
}
else $errors['unitid'] = "*";

#mainnumber check
if(isset($_POST['mainnumber'])) {
  if(trim($_POST['mainnumber']) == '') $errors['mainnumber'] = "<font color='#FF3300'>Field Mainnumber is required</font>.";
  else $fejl--;
}
else $errors['mainnumber'] = "*";



if(!$fejl){
  $carbrand = $_POST['carbrand'];
  $carmodel = $_POST['carmodel'];
  $devicenumber = $_POST['devicenumber'];
  $unitid = $_POST['unitid'];
  $mainnumber = $_POST['mainnumber'];
  $vip1 = $_POST['vip1'];
  $vip2 = $_POST['vip2'];
  $vip3 = $_POST['vip3'];
  $vip4 = $_POST['vip4'];
  $vip5 = $_POST['vip5'];
  $vip6 = $_POST['vip6'];

#strip out specialchars (security)
$carbrand = htmlspecialchars($carbrand,ENT_QUOTES);
$carmodel = htmlspecialchars($carmodel,ENT_QUOTES);
$devicenumber = htmlspecialchars($devicenumber,ENT_QUOTES);
$mainnumber = htmlspecialchars($mainnumber,ENT_QUOTES);
$vip1 = htmlspecialchars($vip1,ENT_QUOTES);
$vip2 = htmlspecialchars($vip2,ENT_QUOTES);
$vip3 = htmlspecialchars($vip3,ENT_QUOTES);
$vip4 = htmlspecialchars($vip4,ENT_QUOTES);
$vip5 = htmlspecialchars($vip5,ENT_QUOTES);
$vip6 = htmlspecialchars($vip6,ENT_QUOTES);
$sql = ("UPDATE x8unit SET carbrand = '$carbrand',carmodel = '$carmodel',devicenumber = '$devicenumber',
    unitid = '$unitid',mainnumber = '$mainnumber',vip1 = '$vip1',vip2 = '$vip2',vip3 = '$vip3',vip4 = '$vip4',vip5 = '$vip5',vip6 = '$vip6'
    WHERE imei='".$_GET['imei']."'") or die(mysql_error());
mysql_query($sql) or die(mysql_error());

if(!$sql){
    print "<font color='#FF3300'>There has been an error editing your device. Please contact the webmaster.</font><br /><br />";
} else {
    print "<font color='#008000'>Your device was successfully edited.
    <script type=\"text/javascript\">setTimeout(\"location.href='login_success.php?action=EditDevice';\",3000);</script>
    <br /><br /></font>";
}
}

#virker ikke
$usermark = $_SESSION['user'];
print "
<font color='#008000' size='3'><b><u>Edit device</u></b><br /></font>
<hr align='left' width='80%' color='#008000'>
";
$result = mysql_query("SELECT * FROM x8unit WHERE imei='".$_GET['imei']."' AND usermark='$usermark'") or die(mysql_error());
$row = mysql_fetch_array($result) or die(mysql_error());
?>
<form action="edit.php" method="post">
Carbrand:<br>
<input type="text" name="carbrand" value="<? print $row['carbrand']; ?>" class="inputfield">
<? if(isset($errors['carbrand'])) print $errors['carbrand']; ?><br>
Carmodel:<br>
<input type="text" name="carmodel" value="<? print $row['carmodel']; ?>" class="inputfield">
<? if(isset($errors['carmodel'])) print $errors['carmodel']; ?><br>
Devicenumber:<br>
<input type="text" name="devicenumber" value="<? print $row['devicenumber']; ?>" class="inputfield">
<? if(isset($errors['devicenumber'])) print $errors['devicenumber']; ?><br>
Unitid:<br>
<input type="text" name="unitid" value="<? print $row['unitid']; ?>" class="inputfield">
<? if(isset($errors['unitid'])) print $errors['unitid']; ?><br>
mainnumber:<br>
<input type="text" name="mainnumber" value="<? print $row['mainnumber']; ?>" class="inputfield">
<? if(isset($errors['mainnumber'])) print $errors['mainnumber']; ?><br>
vip1:<br>
<input type="text" name="vip1" value="<? print $row['vip1'] ?>" class="inputfield"><br>
vip2:<br>
<input type="text" name="vip2" value="<? print $row['vip2']; ?>" class="inputfield"><br>
vip3:<br>
<input type="text" name="vip3" value="<? print $row['vip3']; ?>" class="inputfield"><br>
vip4:<br>
<input type="text" name="vip4" value="<? print $row['vip4']; ?>" class="inputfield"><br>
vip5:<br>
<input type="text" name="vip5" value="<? print $row['vip5']; ?>" class="inputfield"><br>
vip6:<br>
<input type="text" name="vip6" value="<? print $row['vip6']; ?>" class="inputfield"><br><br>
<input type="submit" name="EditDevice" value="Edit device" class="inputbutton"><br><br>
</form>
* Marked fields are required!
</body>
</html>
<?

mysql_close($conn);
?>