Jag har laggt en tråd på apples support sida men inget svar så jag prövar här!

The other day when I was starting my iPod and wanted to listen to my music, it was all gone!
I tried to connect it to my computer to see if iTunes would find the songs. But it didn't.
My computer and iTunes both state that I have used more than half of the discspace on the iPod, so the songs must still be there somewhere...
I have tried the four first R's but I dont wanna restore my iPod and lose all my music.
Has this happened to anyone or does anyone have a solution?

Thanks in advance,
Jim