RDG100KN thermostat integration to desigo via KNX

Hi?

We Connected the RDG 100Kn thermostat with the availability of RDG100KN library block. But the thermostat does not come online.

Error Message : Invalid Subsiderry

There is no any change happened when the Thermostat bus line is disconnected from the PXA30 - K11 ( Extension module for KNX).

PXC00-U with PX knx firmware downloaded is connected via PXA-30N.

Node setup has been done successfully.

I'm grateful to you if you could give me an answer for the problem immediately.

Best Regards,

Carlton