Musketeer

I am trying to learn the piano (keyboard). When I go to Learn Mode and set it to "Watch" there is no sound on the left side when I press a chord. It works in Listen mode. Jingle Bells did this, and Home on the Range, and one other one who's name I do not remember. I have bluetooth dongle and peddle plugged in. I have no Experience with Casio or any other Keyboards. ANy idea how to fix this problem?