disable it, re enter the level, leave, enable it. Is what I did to be exact ^^

Yeah this one is a bit glitchy. What I did to make it work was enable it and disable it via talking to the owls. Eventually I got it to work after once or twice of re-entering. I honestly don't know what went wrong with this remix in particular but let me know if you still can't get it working, I may re-make it to see if I get it running better.

I got it in the rift and have it enabled, but it doesn't seem to change the music for me on any of the acts.