there are a few options for you.
1 could it be full?
2. Go into iTunes and delete the ipod playlist. Build a new playlist and resync by plugging the ipod.
3. F tis doesn't work then you can reset the ipod by plugging it in and when the ipod summary page opens in itunes, press the restore button. this will return the ipod to its original settings. It will then resync with the ipod playlist.



