Damn, I thought that might do it. Still no go here.
Hmmm... last suggestion... using some other usb/wireless controller/keyboard/mouse/whatever ... see if there is an update for the puck itself. I know I'm throwing out common suggestions... just trying to help. Also not sure if the puck has an option to return to factory settings, but maybe go back to factory and then update it. Worst case, you'll just have to contact the manufacturer... though given you bought it off ebay, no telling if they'll do anything for you.
Of course it not working with your pc, even wired, doesn't seem like it's the puck. But at this point it can't hurt trying.