Took my Dimension 5150C home for the holidays, but forgot the wireless receiver. So for the last few days, I've been using a USB keyboard and my normal wireless mouse with a Logitech wireless mouse receiver. Now I have the Dell receiver back - and the keyboard isn't doing anything. The mouse still connects fine. I've tried pressing the connect buttons, restarting, reinstalling the hardware, updating the device drivers, system restores - everything I could think of. I've also tried using the receiver on another computer - again, the mouse works fine but the keyboard isn't doing anything. any help would be much appreciated.