After Effects won't accept my 670

Hi all,

I have after effects CS6 (11.0.0.378) and I'm looking at doing some basic 3D stuff with the raytracing engine. I have a 670 with the latest cuda driver (5.5.31) and the normal one (331.65). Even after reading numerous articles changing various files I still can't get ray tracing to accept my card. If I ad GeForce GTX 670 to my raytracer_supported_cards file then I get an error on startup of after effects saying error initial shader compile failed. I have even gone and changed the compatability in the nvidia control panel.

Thanks