Bind procedure for V977 with Devo 8s and NRF24L01

I'm struggling to get the TX to bind to the model.

I get 5 flashes on the rx followed by a pause repeated but nothing else.

I have installed the module and initialised it in the hardware.ini file as A13 which allows me to select the KN protocol in the model menu. (tried switching to A14 to see if this helped but got a message on the start-up screen saying the module was missing)

I have included the .ini files that I'm using for clarity.

I have noticed that when I boot the tx or press the bind button that the procedure ends almost immediately. I'm not sure it this is relevant?
I'd really appreciate any help with this.

Thanks

hello,

i fly with v977 and devo 8s. this is my config.ini
the bind procedure :
devo on
v977 on
bind in 3 sec