I was adding four new songs and when I disconnected my iPod, I went to music and all my songs are just cleared, It's empty and when I connect it back to my comp, it says 5 gb used (Which is right) but my songs aren't showing up, What do I do? I tried re-installing everything but it didn't work.
Are all the files in iTunes? If you have the iPod set to 'Automatically Update all songs and videos' then it will only put the songs/videos in iTunes, and delete all that aren't in iTunes. Post back if you still haven't figured it out. ;-)