Nvidia+ ATI hybrid physx glitch!

Ok this one might be kind of tricky...ill try to be as clear and keep it as simple as possible....

I have a 5850 and a gtx 260 (dedicated physx), updated drivers and am using the newest version 1.4 of the physx hybrid mod.

I have a pc monitor hooked up to the gtx and a hdtv hooked up to the radeon. I enable physx on the pc monitor and then switch over to the hdtv so that I can use physx while also using the power of my 5850.

When i play a physx intensive game on the hdtv it runs very smoothly but im getting graphical glitches on particles. The particles appear as large greyish flashing boxes and blobs. If i switch and play on the pc monitor the boxes are gone but the 5850 is not used and the performance suffers.

Ive searched all over the place but cannot find a solution or even anyone with a similar problem. Batman: AA runs great with high physx and no particle glitches. The games I have problems with are Dark Void (particles from gunshots are glitched) and Mirrors Edge (water particles appear as grey boxes and blobs) and also the Warmonger Physx showcase shows particle glithches. *other physx demos such as fluid demo works fine.

please help if anyone can...