hi! i recently bought a wired, fast optical mouse (800 cpi) because i'm tired of cleaning the ball of my previous mouse every now and then. at first, the optical mouse works fine but when i access other devices such dvd or cd rom, it gets disconnected. i have to unplug and plug it in to make it work again. but after a while it will be disconnected again. i experience the same problem whenever i play halo or other fps games. i already replaced my 300 Watts power supply with 450 watts because i thought 300 watt is already inadequate since my computer is fully loaded with so many peripherals. i'm sure there's nothing wrong with the optical mouse because i have tried it in other computers and works fine. need your help badly, thanks.