I finally started getting my PCM E7s on the tracks and trying out their functions, however, I have one E7A that the sound comes on but can’t get any of the other functions to work and can’t get it to move forward or backward. Tried changing the address with my digitrax system and it jumped a little at first as most do with the updated address, but could not get any other response. All of my others work fine; I will have to turn the volume down but am unsure how. Looks like a weekend of DCC fun. Any suggestions?