Input type file problem

Hej eksperten,

Jeg har et problem med min  upload billede funktion. Den fungere som den skal i Chrome og Firefox på både OSX og WIN, men i IE virker den ikke. Nogle der kan fortælle mig hvorfor?
P.S Jeg ved ikke om det er det rigtige forum jeg skriver dette i ?





<div style="margin-left: 205px;">
<p style="font-size: 9px; margin-left: 2px;">Optimal billedstørrelse: 182x137 (*.jpg)</p>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" enctype="multipart/form-data" id="something" class="uniForm">
        <input style="margin-right: 230px;" name="new_image" id="new_image" type="file" class="fileUpload" />
        <button name="sbumit" type="sbumit" class="submitButton knap">Upload billede</button>
</form>

<?php
    $firma =$_SESSION['firma'];
        $newfilename = "$firma.jpg";
        if(isset($_POST['sbumit'])){
          if (isset ($_FILES['new_image'])){
              $imagename = $newfilename;
              $source = $_FILES['new_image']['tmp_name'];
              $target = "firmapic/".$imagename;
              move_uploaded_file($source, $target);
 
              $imagepath = $imagename;
              $save = "firmapic/" . $imagepath; //This is the new file you saving
              $file = "firmapic/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file); 
 
              $modwidth = 175; 
 
              $diff = $width / $modwidth;
 
              $modheight = 100; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
 
              imagejpeg($tn, $save, 100) ; 
 
              $save = "firmapic/sml_" . $imagepath; //This is the new file you saving
              $file = "firmapic/" . $imagepath; //This is the original file
 
              list($width, $height) = getimagesize($file) ; 
 
              $modwidth = 175; 
 
              $diff = $width / $modwidth;
 
              $modheight = 100; 
              $tn = imagecreatetruecolor($modwidth, $modheight) ; 
              $image = imagecreatefromjpeg($file) ; 
              imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
 
              imagejpeg($tn, $save, 100) ;
        echo "<b>Billedet er sucessfuldt uploadet til din profil</b>";
 
          }
        }
?>
</div>