help - with pdf downloads

I'm directing client via a link to a download page for pdf documents. This code works on mozilla + firebird but in IE however it pops up with a open/save dialog - with the filetype missing and then an error when open/save pressed saying "cannot find the site". As you can see below I've tried all sorts of variations but still the same error can someone help me out !!! tia Pete --------------------------------------------------- $dir = '/www/cgi-bin/docu/pdfs/'; $file = $dir.$row['path']."/".$row['file_name']; $file_name = "file_".trim($_GET['n']).".pdf"; //force download dialog header("Pragma: no-cache"); //header("Content-type: application/octet-stream\n"); header("Content-type: application/pdf\n"); //header("Content-type: application/x-download"); //header("Content-disposition: inline; filename=$file_name\n"); header("Content-disposition: attachment;filename=$file_name\n"); header("Content-transfer-encoding: binary\n"); //header("Accept-Ranges: bytes"); header("Content-length: " . filesize($file) . "\n"); //send file contents $fp=fopen($file, "r"); fpassthru($fp);