look at what file format the track is in..
.aac, .m4p, .mp3
some older files on itunes are in protected .aac format. there are programs which can rip them to mp3 format and there are also players which can play such files on android.
its a big pain in the ass to swap music players on your device so i would suggest changing the filetype.
type into google "123 to mp3 converter" where 123 is the file type you have.
Oh wait never mind thanks I'll choose best answers!