DynESS refuses to go to mode auto

I have one site working well on DynESS. however on another site I’m unable to set battery capacity on VRM. The error message is that two way communication is not enabled. As far as I can see, it is set on the Cerbo. I’m aware that others have had similar issues but I’m stuck! Running v3.70 now.

Thanks R

Some pics:

What does connection status say on the VRM page in the VenusOS?