Keystation Mini 32 Stuck on 1 Track

My Keystation Mini 32 is connected to MPC Beats and is working but it plays only one track. When I select another track in MPC Beats, the Mini 32 doesn't change over and play that track. I have all the MIDI input ports set to the Mini 32. The keyboard in the MPC Beats GUI is working fine. What am I missing?

OK I think I figured it out. The keyboard will play the sound of the instrument assigned to any track that has its monitor button set to either On or Merge. If you have two tracks set to ON or Merge the keyboard will play both instruments. Which track is selected has nothing to do with what the keyboard plays.