Hey guys, I just bought the RCA rcu1010 and got everything hooked up, except for some reason I can't get my audio system hooked up. It is a sony STR-DE697 - It doesn't have tape or Cd, but when I try the tuner and amp, neither of them seem to work.
The remote has an area for Audio 1/tape, audio 2/Tuner, Audio 3/Amp, Audio 4/Cd. I just want my surround sound to work. What would I put it under? I have tried many of them, but none of them seem to work.

Thanks for any help.