I'm trying to get two different radios to talk to one another and I'm running into an issue that I think is due to me never having programmed a radio before! Specifically I'm trying to integrate an Amcrest ATR-22 radio with a Vertex Standard EVX-531. I'm using the CE142 software for programming the 531s and CHIRP for the ATR-22. When I transmit from the ATR-22 the green receiving light comes  on the EVX-531 but there's no audio. When I transmit from the 531s there's no receiving light on the ATR. 

Does anyone have any idea what I'm missing here? I'd really appreciate the help.

Thank you!

MFH