Windows 7 Cs 1.6

I can't run CS 1.6! LOL. I can run CS:S just fine, and other more demanding games, but when I try to run 1.6 the screen just flashes constantly and it says I'm getting 7 fps (I avg maybe 150 on source). I've tried running in compatability modes, but to no avail.

Running Win7 64 bit.
Intel Q6600
ATI Radeon HD 4760 512 MB

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