Pudgy

I can not get my game to recognize my side buttons on my mouse like it use to.
They would, i believe be Mouse Button 4 and Mouse Button 5, but I might be off by one number.
System:
Win 7 Ult. 64bit
4g HyperX Ram
Close to 2tb HDD
9500GTX Vid
Cable internet
Logitech MX518 mouse
Logitech G15 keyboard
Is there anything I forgot to mention?