Hvorfor resizer den ikke?

Hey alle...

Hvordan kan det være den ikke resizer billedet ned i størrelser og gemmer det i den størrelse som det bliver resizet til ?`

<? include("../includes/cnx.php"); ?>
<? include("../includes/rtrnfuncs.php"); ?>

<?
$Doc_ID = $_REQUEST['doc_id'];
$file = $_FILES['userfile'];

if($file == "" ){
        echo '<script>alert("Du skal vælge et billede");</script>';
        echo '<script>history.back(-1);</script>';
}

// Do this process if user has browse the file and click the submit button
$image_types = Array ("image/bmp","image/jpeg","image/jpg","image/pjpeg","image/gif","image/x-png");

  if ( !empty( $_FILES['userfile'] ) )
    {
        if ( is_uploaded_file( $_FILES['userfile']['tmp_name'] ) )
        {
            $bname = basename($_FILES['userfile']['name']);
            if (move_uploaded_file( $_FILES['userfile']['tmp_name']
                ,"../../userimages/" . $bname) )
            {
                resize( "../../userimages/$bname", "../../userimages/$bname", 500, 1000000 );
                //resize( "600/$bname", "300/$bname", 300, 1000000 );
                //resize( "300/$bname", "200/$bname", 200, 1000000 );
                //resize( "200/$bname", "100/$bname", 100, 1000000 );
                // Gem evt $bname i databasen
            }
        }
    //}

  $file_name = $_FILES["userfile"]["name"];
  $file_size = $_FILES["userfile"]["size"];
  $file_type = $_FILES["userfile"]["type"];

  if (in_array (strtolower ($file_type), $image_types)) {
    $SQL = sprintf("INSERT into doc_images(image_type, image, image_size, image_name, doc_id, url) values('%s', '%s', '%s', '%s', '%s', '%s')", mysql_real_escape_string($file_type), mysql_real_escape_string($userfile), mysql_real_escape_string($file_size), mysql_real_escape_string($file_name), mysql_real_escape_string($Doc_ID), mysql_real_escape_string($bname));

    $mq = mysql_query($SQL) or die(mysql_error());

    ?>
    <script>document.location.href="edit-image.php?doc_id=<?=$Doc_ID?>&t=<?=time()?>;>"</script>
    <?
    exit();
  }
}
?>