My Wii U can adjust the input and volume of my TV as well as turn it off and on. However, when I try to set it up to access the cable box, the "it worked" button upon testing it doesn't activate. What am I doing wrong?

In order for it to activate, I had to test each of the controls that it listed, not just one of them. I think it was Power and channel up and down, but don't recall.

Keep trying volume/power buttons until it turns on. I thought it was weird too but I got it to work after a few tries