Thank you for your help.
@chris Node 2 was in fakt the problem. I removed the node completely. Then did everything I did before (Reset Door Look, Switched it to S0 then inclusion over OH).
I would never ever thought that this device(Node 2 a Switch, which wasen’t even pluged in since log) is the root cause. By the way, the “Log Viewer” is there realy a awsome tool finding those problems.
Thanks a lot for your support and patience!!!