file download in IE

Hi! How on earth do I make Internet Explorer to download a file generated with: header("Content-type: application/octet-stream"); header("Content-Disposition: attachment; filename=$fname"); include($this->dir . $fname); exit; It works on http but I need it on https and if I try to download it through https Internet explorer says it can't find the website.. after it asks me if I want to save the file. I have checked the page and it works with: netscape under windows and konqueror, galeon, netscape under linux. I have seen reports on the web about this "feature" of Internet explorer and they all say to download some service pack.. I have updated my internet explorer to the latest 6 version with all the updates on the web but it still does not work! Anyone knows a workaround for this? I don't want to do it with header ("Location: somefile") because the file that I want to make available for download is outside the webroot and i want it to be accessible only through my script. Thanks a lot! Eagerly waiting for a response, Mihai