ok so my ipod works fine, there's nothing wrong with it but for some reason when i connect my ipod to my computer and open up itunes, itunes freezes up. my ipod is fine but itunes cannot function while my ipod is connected, meaning i cannot sync or go to my library or anything. i had this problem before and i thought i fixed it when i put it into dfu mode and restored it, but i guess it only worked once because i connected it again and its doing it again now. anyone have any suggestions? ive tried almost everything including rebooting, changing usb ports, different dock connectors, and i called apple support who told me to put it into dfu mode which only worked once. what should i do?