This is my first post, let me know if it is in the wrong forum. I have an older Pioneer VSX-D606S that I'm trying to figure out how to get all of the speakers to work at the same time. It has connections for 2 pairs of Front Speakers A & B, a set of Rear Speakers, a Center Speaker and a Subwoofer. I can get sets and A & B to play together, but then the Rear speakers don't sound. To get the Rear speakers to work, the B front speakers cut off. Is there any way to get all of the speakers to play at the same time with this unit? Thanks in advance for any help.