How to prevent caching of swf files?

I’ve searched everywhere for a way to prevent the caching of my swf files. The last thing I tried using is the ‘Expires’ header and the Pragma no-cache header suggested by Adobe ( It sounded like a good solution but it still didn’t work for me. Has anyone found a reliable way of doing this? Can this be done using ActionScript?

I’m running Flash 8 and exporting to Flash Player 6. The browsers I’m testing in are IE 6, 7, and Firefox. Thanks in advance!