Hi Sorin, did you manage to get things working at all? Have you tried the steps described by CWS above? I added the helper XML files (i.e. transport & pots) in the thread mentioned previously, but as the Axiom 2nd gen is slightly different; its possible that the files might need altering slightly if they aren’t working as expected . You should additionally visit the thread below to make sure Cubase is seeing your MIDI controller properly as you might find it helpful in this respect:
Additionally, I’ve just set out the steps to update the aforementioned XML files to work with a different M-Audio keyboard - so you should work your way through that and hopefully that should sort it out:
I’ve subscribed to this thread so just reply if you are still stuck and I will see if I can get you up and running 
Kat