Telemetry not working with a R9-MM-OTA

Hopefully someone can tell me what in doing wrong.I installed a R9MM-OTA on a copter but I can’t get any telemetry working…My radio is a Horus X10S running opentx, my R9M module is one of the original ones so I flashed the R9MM with the latest ACCST firmware. I bound the RX to the TX just like I would using an R9-RX and they always worked fine for me. I have an MLVSS voltage sensor connected to the S.Port of the RX but the TX isn’t able to find any sensors no RSSI or anything. I must be missing something really simple but I sure can’t find out what.

In order to get the sensor readings on your tx, you need to have yaapu lua script running and then discover sensors.