Can't download to Mac MSIE

Hi, Below is the code I use to provide downloads of purchased software. It has always worked great for all browsers, except MSIE for Mac (OS X and OS 9). They just receive a blank text file called getfile.php (which is the name of this doc). Can anyone suggest a way to improve this to work better and include those browsers? header('Content-Type: '.$file_row['content_type']); header('Content-Disposition: filename="'.$file_row["filename"].'"'); $size = filesize('../../store/files/'.$file_row['filename']); header('Content-Length: '.$size); header('Content-Transfer-Encoding: base64'); readfile('../../store/files/'.$file_row['filename']); Sample data: content_type = 'application/bin'

  filename     = 'software.bin'