Ok, it sounds like you have it all set right.
Ignore button controller for a moment. Try Rule Machine. It can also act as a button controller.
Click on Trigger, select " Button Device". From there you should get a very similar interface to button controller. Try button 5 there and see what happens. I would ignore the other buttons for a moment.
There are also 3rd party button controllers that I really like better than the built in controller for most purposes. This is one example that I like and use.
