download script (for mailclient), works in FF, not in IE, what to do?

[surion]

currently i m writing a mailclient, when there is a file attached to the mail it has to be downloaded, i tested this with next 2 parts of scripts:

 

first one:

header("Content-Description: File Transfer");

header("Content-Type: application/octet-stream; name=\"".$filename."\"");

header("Content-Disposition: attachment; filename=".basename($filename));

header("Content-Transfer-Encoding: binary");

 

second one:       

header("Content-Description: File Transfer");

header("Content-Type: application/force-download ");

header("Content-Disposition: attachment; filename=".basename($filename));

header("Content-Transfer-Encoding: binary") ;

 

they both work fine with Firefox (2.0), but neither works with IE (using IE7), any suggestions to make at least one of them work in IE7 as well?