Dear Bob and all
I use a rotator which is also focuser .
It is called "ROTOFOC" and is made by Italian company called Reginato.

Until now in tests i had no problem using only the rotator (set up and used correctly)
Tonight i tried to use also autofocus with focusmax.
The focuser and rotator use the same ascom driver and working unde the same software .
My problem is that when rotator is on (connected) when acp try to connect focuser i get error (see attached)
Any idea how can i solve it?