device not found error


I am new to CUDA. Every sample program I try to run from the SDK browser spits back a “Test Failed” error beucause it can’t detect a CUDA compatible GPU on the system because in the first line of the output prompt it says “using device 0: emulation (CPU)”. But I have a Geforece 8600GT and I’ve installed the latest versions of the CUDA SDK, toolkit, and GPU driver. Anyone know what’s wrong? Many Thanks.