get_cvar_pointer() returns just a POINTER, you need to use set/get_pcvar_*(pointer, ...), it doesn't hold and update the value... also, the AA() function won't trigger because it's not called anywhere.
You *could* use set_pcvar_num(), I think that doesn't trigger the console messages... however, this is much more efficient:
http://forums.alliedmods.net/showthread.php?t=120866
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