Hi, I am not the ultimate BMW specialist but I can help a bit. As I understand, the KOMBI is connected with the ZGW via the PT-CAN. If I remember well, the KOMBI is programmed / coded via the PT-CAN not the MOST.
The CAS module give the Wake-up signal to the KOMBI, do you have connected the KOMBI wake-up signal at connector A71*1B pin 11 and have sufficient voltage?
Hope this helps,