"Song Not Downloaded" Error

[mtchristo]

I would like to be able to play all my itunes playlists within spotify so I don't have to use multiple apps to listen to music but if I select one of my itunes playlists it will tell me that some of my songs are "Song Not Downloaded, If you own the song, you can sync it from your computer." I do own the song & it is on my iphone. I can play it through the music app but not spotify. I went through the troubleshooting & made sure I was sharing my xml info. Anyone know how to fix this???