FS key problem

[Jan 737]

Hi,

I add the third fskey card (CID 3 )to my fsbus system.

But there is a problem:
No problems with separate switches, but when I add a 12-stage rotary then strange things happens.Turning the rotary,for changing the nav1 freq.,sets the spoilers to 100%, flaps goes down,N1 increase.
No matter on what RID I connect the rotary.
Chanched the rotary for another, same problem occurs.

Any idea what can cause this?

Bets regards
Jan Geurtsen