There's also a warning that pops up with the trainer when it first appears on the desktop about using it online (which I wouldn't.) I bought the game off Steam.
I've tried the tricks in the troubleshooting hints on this page (ALT/TAB, Run as Administrator, etc)but no luck yet.
Is there anything else I can do? I've heard some COD title just will not let you use a cheat, even in single player.
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