php image tracking that can also display flash swf need help

Hi guys,

I have a script for image tracking with php but I dont know how to display flash on it:

the tracking.php:

<?php
if (isset($_GET['file']))
{
      if ($_GET["type"] == "swf")
      {
             header('Content-type: application/x-shockwave-flash; name='.$_GET['file']);
       }
      if ($_GET["type"] == "jpg")
      {
             header("Content-Type: image/jpg");
       }
      header ("Location: impression_files/".$_GET['id']."/". $_GET['file']);
      exit();
}
else
{
  //do nothing
}
?>

the html with the image code:

<img src="http://xxx.com/tracking.php?id=795&file=banner.swf&type=swf" border='0' alt=''>

If I use a jpeg it has no problems, but flash cannot show, can anyone help me please~! thanks