So i have a iPod Nano and i recently lost my upload.charging cable. I went to future shop and bought a after market one so i could charge it but for some reason it will not allow me to update my iPod. Usually when i plug my iPod into the USB port iTunes pops up with my iPod info and lets me sync. But now when i plug it in nothing happens. I tried opening iTunes manually and still nothing. my sync info doesn't show up or anything. I have search "My computer" for the USB pork and says nothing is plugged in but yet my iPod is charging. Can some please help me update my iPod.