Issues with playlist

[atb224155]

I'm having some issues with my playlist. Not the one that you can make from spotify, but ones that you can transfer from either itunes and windows media. For the past month or two, the 3 playlist that I have from itunes have either gone completely out to where I have had to delete certain songs, or where I have had to remove the playlist all together. Now it's not showing the music at all. Some of the songs I got from itunes and others are either from spotify itself or from the pack of cds that I have. If you could fix this problem, that would be great.