There may come a time in your iPod life when things don't go quite as planned. Fortunately, your issue is most likely temporary, and you have the power to do something about it now.
Start here
If you still didnt find your answers try what is called the 5 Rs
iPod issues?
1. Reset your iPod
2. Retry with a different USB port
3. Restart your computer
4. Reinstall iPod and iTunes software
5. Restore your iPod
This information comes to you courtesy of Apple Computers.