My ipod will not sync or charge

Hello,

I just recently got a a laptop because my desktop computer crashed. I lost my itunes when it happened. So when i got my laptop I downloaded itunes and hooked my ipod up to it to sync it with my new itunes and nothing happened. It would only charge it. I searched and searched for the problem and I found out that I have to have the white usb cable that comes with your ipod for it to sync. So i bought one of the apple site. It just came in today and the new usb cable will not sync or charge my ipod. I've already tried to reset my ipod and put it in disk mode and still get nothing. I've tried to go to device manager and see where it says ipod in there and it doesnt say ipod nowhere. Ive already tried uninstalling itunes and reinstalling and that didnt help either. Please help me if you can.