Question about 12v trigger on Denon 3803

I'm trying to pair my Denon 3803 with a 5 channel Rotel 1075 power amp. I have tryed, without success, to use the 12v trigger on the Denon to power on and off the Rotel amp. Is this just not possible with The Denon? In the Denon manual, trigger setup menu allows output for PHONO,CD,TUNER,TAPE,DVD,VDP,TV,DBS,VCR-1,VCR-2,and V.AUX. There is no option for amplifier. I do have all options set to ON. Let me explain my results. With the 12v trigger made from the Denon to the Rotel 12v trigger in, and the toggle switch on the Rotel 12v trigger switched to on, I get no output. The only sound I am getting is from the subwoofer. The only way to get sound is to switch the 12v trigger toggle to off. Any help would be greatly appreciated.

Thanks,
Aaron