If your controller is not responding to your inputs on the remote, it may need to be paired. Only one remote can be paired to the controller.
To pair the remote:
Press and hold the music up and down buttons on the remote at the same time (the buttons with the music notes on them).
While holding the buttons down, plug the power connector into the controller.
You should get three white flashes to indicate a successful pairing.
NOTE: Do not cover the color ring with your hand while installing batteries into the remote.