Hi Georg,
sorry, but I use the actuator FMS61NP with some FT55 switches and the EnoceanPi 868 modul for the Raspberry PI.
I have no working implementation of a FSB61 actuator.
All my information are documented in this thread and in the thread [SOLVED] Enocean Binding, Cannot send from EnoceanPi to actuator FMS61NP.
Maybe the other (solved) thread can help you?