Korg 49 Triton Taktile

[demir]

Have problems to send controller messages.
I set e.g. knob 8 for controlling something but MIDI does not go out.
Standard playing, pitch bender, mod wheel all work.

I see that my knob is CC #64 but the MIDI message does not go out.
Midi is also set right. Everything in accordance w manual.

Is there something I am overseeing?

Thanks for any help.