Forget checking that information, check these things:
Does your computer recognize the touchscreen. i.e. in the system/hardware/usb do you see the touchscreen show up when yo unplug or plug it in. Usually winxp gives some kind of ballon notification in the taskbar.
Make sure your Cable doesn't have a bent pin. <-- CHECK THIS. This is what i think your problem is. If not your USB controller could be bad, thats why i asked if Windows recognizes it.