iTunes is messed up

Ok, here is the situation:

I have my music saved in ‘C:\Documents and Settings\Main\My Documents\My Music\iTunes\iTunes Music’ but yesterday I decided to try and keep my music onthe E drive instead (because I’m running low on space on my C drive).

So I cut the iTunes file and pasted it in E drive. Now when I go to iTunes all my music has gone. In edit, preferences, I change the file location to the Edrive, but nothing. I tried changing it back but again none of my music (except purchased music) has appeared.

Please help, I need my music back and not sure what to do next. Luckily, I still have my music on my ipod, is there a way i can upload them back onto the computer?

I’d be very grateful if someone could help me. Thanks.