i had my trackball plugged into the usb via utlimarc's opti-pac. it was working like a charm, and i unplugged it, plugged it into the same usb port in the back of my pc, not the front and it is coming up unrecognizable. i would think this is impossible. well i'm inches from throwing my whole control panel out my f'in window, so any godly soul who can help me with this, please do.