iTunes 4.9 upgrade...



Before this upgrade, I did an awful lot of organising my music files/playlists. Somehow, when the upgrade was done with a couple of others include iPod, iPhoto & Airport softwares, all the files and playlists have gone missing in the iTunes (4.9) browser window. My iTunes browser gone completely blank now.
Fortunately, the files are still intact in the iTunes Music folder.
Do I really have to reorganise all of them again coz i have approx 34GB of music files, what can I do to reinstate the situation?
ALso, I have done indexing (CTRL + I) on the music folder, still indexing...

Anyone could help me out with this?