USB device drawing too much power error message
When I try to plug my iPod into my computer to charge or update my music, I get an error message that says, " Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled." I've tried this while my computer was plugged in and not plugged in and it still gives me the same message. My computer is completely new, I've only had it about 2 weeks, my iPod is about 3 years old, but the actual iPod works great. It's just the USB cord that is giving me a problem. What is wrong and how can I fix it?
iPod touch, OS X Mountain Lion (10.8.2)