Flash player proxy problems

I currently have a T1 for my CyberCafe gamers and a DSL line channeled through my 2006 ISA server as a proxy for Internet users. We are in a workgroup environment. All the proxy settings are set on Internet Explorer for all our PC's. After some testing I realized that anything played through the Flash addon or player are bypassing our browser's proxy settings and using the T1 which is specified as our gateway thus causing massive lag on our T1 line. You tube movies and other players don't seem to have this problem, only Flash Player. In short Flash Player is ignoring our bowser proxy settings in favor of our gateway / T1. I performed a test and removed the gateway on a test machine forcing Flash to use our proxy and everything works fine. But if I change it back, Flash favors the gateway over the Internet Explorer proxy browser settings. I've been searching everywhere for an answer to this problem with no luck. Does anyone have any info on this problem? There are no options to specifly a proxy for the flash player anywhere else. Please Help.