When in Ableton, some keys don't trigger my VST ? Also, some keys switch the Ableton view etc? What's going on?
In the Midi setup you should see two Input lines for the Keylab mk II (and perhaps one output line)
Make sure the two input lines are set correctly.
Line 1 "Keylab MK II XX" (49 or 61) should be set to TRACK and NOT Remote
Line 2 "Keylab MK II input" should be set to REMOTE and NOT Track
btw. Arturia - the verification for posting here sucks bigtime. I am fed up of searching Google for answers.
I hope this helps.