I have been having this problem recently with Songcraft. Sometimes I can play all the songs just fine. No problem at all.

However, most of the time, I play a song, and it doesn't play. It makes the circle spell when you start it, but it stops right away and doesn't buff. This also happens if another song is also playing, and it cancels all existing songs.

I have no idea what is happening, nor what to do to fix it.