Denon AVR 1609 Receiver Zone 2 has no sound

I just bought the Denon AVR 1609 receiver that has a 2nd zone. I hooked up the inwall front and rear speakers plus a center speaker and subwoofer. The sound is incredible. For the 2nd zone, I have a Sonance Speaker Selector that allows up to 4 speakers in different rooms to operate independantly. This is hooked up to the Back Speaker/Amp Assign part of the receiver. By default the "Amp Assign" is meant to be set to Zone 2. I've checked and rechecked all connections, but I get NO sound out of these speakers at all. They test that they have power. When I press the Zone 2 button, the Main Zone speakers work. They work at all times, with or without the Zone 2 button pushed 'on'. It's like the system doesn't recognize there is a Zone 2 at all. I get no help from the manual. Is there something I can do to set this back to some sort of default? The Main Zone was dead-simple. What am I doing wrong with Zone 2? Your advice is greatly appreciated.