The FB can not switch off.

Have purchased the remote control for my DDX5025DAB.
The unit is front DDX5025DAB installed in my motor home in the cab.
I wanted to use the FB from the sofa and from the bed.
Everything goes well but you can not turn off the power switch or at least state-bay.
What should I do with such a remote ??? not useful for me.
When I sit next to the device you need yes no Ferbedienung.