When i play on UT2004, after about 5-10 minites of gaming the crosshair on the screen starts to stick. I can still run around fine, but i cant change my direction of aim. As you can imagine this is a big pain when you trying to own. It isnt my harware because it still does it on low settings, could it possibly be my optical mouse? Any help is much appreciated.

Well does it do it in any other games?? If it does then I would think it's the mouse. Have you checked the connections on the back make sure it's plugged in good? Sometimes those damn things have a tendancy to get loose if you unplug and plug them in. I have that problem with loose connections becuase I work on my comp alot.

Nope, its fine with all other games. I've fiddled with all the sensitivity settings and still no change.