I have recently made some changes to my reciever and dont know what I have disabled that would cause the SUB to not play when playing CD's. The reciever shows the SUB is enabled but it doesn't matter what mode I am in, Stereo, DPLIIx, 7ch Stereo, Rock.... But Yet when I play DVD's or watch HD Stations the sub plays. It used to work correctly. Any suggestion what I did?