RX4R binding issue

[Slatemetal]

Before I bind my RX4R to my 9x lite, do I need to update the firmware on it? Firmware on the 9x lite is updated thanks to FrSky booth at Flightfest.

 

[FDS]

If you are using Access firmware that doesn’t support D8 or D16, you will need Access firmware in the receiver module as well.
I think the very latest version did allow you to bind to D16 without needing to upgrade. Try it. If it doesn’t work then update the firmware on the RX.