IIS 6 shouldn't cache SWF files

Hi,

I've a development directory at my web server and life to test my development swf there.
However when I try to run it there my preloader ever gets the version from the productiv side.

I found some article with google about but no solution helps for, e.g.:
Meta Tags:
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="0" />

Calling the swf with a unique param:
my.swf?id=4711

But nothing works for me.
This happens only when the it's called via html, calling the swf works fine.

Is there a way to tell IIS 6 to never cache swf in my developing directory?

Thanks,

Andre