have u changed ur setting to USB 2.0? from USB 1.1? as WinXP (no SP installed) cannot support USB 2.0 directly. so you have to either switch the USB to 1.1, or upgrade to SP1, or sa well u might have lost USB drivers, which I thing u can download and install.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"