Cannot show reuploaded image file on page unless manual refresh

I am using the following header() functions to force view.php to not cache: header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1 header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); // HTTP/1.0 However, when a user reuploads a file in manage.php, it does a form post onto manage.php and reuploads the file (which I verified works). However, when redirected via header() to view.php, they still see their OLD image file, NOT the new one! Unless I manually refresh the page, they never see it, until they manually refresh the page, then the new image file appears! I am handling file uploading this way: If they select another file to upload, the old file is deleted and the new file uploaded. Any suggestions? Thanx Phil