I will not give up until I found a solution… The problem sticks like s…t. The OCTATRACK and the ANALOG KEYS do change their pattern when I send Program Change Messages from my MPC Live but they are ONE LOOP LATE, still… On the AK the light for the pattern running changes when the message hits but the synth reacts one loop late 
I’m sure there is someone here who has the answer to this question I just have to ask often enough. So here is the next attempt to get this problem solved. Is there maybe any ElektronSpecialist here in the forum with a solution that doesn’t start with: Well the problem is on the MPC end, …c’mon…