Octatrack not sending MIDI CCs (even though the parameter IS activated!)

hey folks,

Im using my Ocktatrack mkII as a midi controller vor my Virus.
I have no problems using the octatrack as a sequencer, and even the basic Midi CCs like Panorama and Main Volume Work. But when I want to change for example the Filter Env Attack, which should be the CC nr. 54 nothing happpens.
I Did activate the parameter both on the Midi ctrl setup page AND the main page. also midi learn doesnt get anything if i turn the according knob, even though i get the smal pixel at the top left corner when i turn it.

How can i get my Octa sending the CCs to my Virus? what am I missing out? :frowning: