This is my problem: I load up iTunes and it runs. Then I attach my Ipod U2 Edition to the computer using the usb cable and then the apple symbol loads up then after a short while a folder with a exclamation mark appears then a few seconds after that the do not disconnect sign appears and it flashes for about 10 seconds and then shuts off and then I am back at the Ipod logo. Can anybody suggest what is wrong with it? Or do I need to go to an Apple store and ask them.