Trouble with QuickTime .mov files on Internet Explorer

After in depth experimentation, I can’t find a way in which a .mov file that is set to progressively download will successfully do so within an IE browser (though it works just fine in Firefox and Netscape).

I have tried VideoPop and others, and cannot come up with a cure!

the file in question is at:

https://immigrationoutpost.com/test/2006/02/23/the-mirmehdi-brothers/

I need to solve this ASAP!

thanks in advance for any tips