Help - lost all my library

[bnb]

Just in Limewire and iTunes. They show up in name only in iTunes but when I click on a song it gives the message, "the song "xyz" could not be used because the original file could not be found. Would you like to locate it?" When you click "Locate" it takes you to the folder/file: My Documents/LimeWire/Saved. None of the old songs are there just some of the newer ones that I've downloaded. I have no idea why they disappeared or where they went. Thanks for replying to my request! - David