I cannot get my new Denon avr to pair with my genie remote

Just upgraded our 20-year-old avr with a Denon avr-S570BT. I have searched for hours to try to find an answer to why I cannot get it to pair with our Genie RC73 remote. The set up is the genie runs to the avr via HDMI in the SAT port, then from the avr to the tv via the monitor port to the HDMI arc port at the tv. Everything sound wise works great, but when I try to pair the remote to be able to use the volume and off and on with Genie remote, I get nothing. I looked for the model number in the list and it's not even listed. I tried using "I don't know the model" and let it search and it comes up with nothing. Even tried to enter some codes but there's no way to do that with the RC73 remote. In one search I found someone had the same problem and was able to get it to pair with the same hookup I have. Any Ideas would be great to hear.