[SOLVED] Midi routing for Interapp Audio in Cubasis?

I can record Korg Module as Interapp audio.

But to havew better control I woould like tprecord a midi and route that to the Module Audio track.
So far I was not successful: I created a midi with my controller keyboard as input and “Module” as output, but the Module audio track does not react.

Funny: after going back and forth between Cubasis and Module, suddenly the midi routing decribed above does work.
No idea why it didn’t work form the start.