I am giving downloads to user using the PHP code below but when user downloading they are not able to see the progressbar in IE8 when clicked on save button. Please solve this. Thanks in advance.

header('Content-Description: Songsbin.com - Downlaod');
header('Content-type: audio/mpeg');
header('Content-Disposition: attachment; filename='.$filename1);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: '.filesize($file));
ob_clean();
flush();
readfile($file);