Can anyone please help. I keep having problems with the music on my iPhone5 (iOS 8.1.2). My music is there but the tracks are greyed out... When I open iTunes on my MacBook my music is there... When I attach my iPhone and look at the Device content, only a fraction of my music appears... When I go into Settings in iTunes I can tick to sync all my music, but it still doesn't appear on my iPhone. Any suggestions please?