Yeah, it seems that I'm a soliloquist but I still hope that anyone has an idea.
In the past I did not made a licensecheck before solving the problem, because I was running the program in arcmap where the license should be clear I thought.
Now I put the license check between solving an clicking and it runs *happy*.
But this solves my problem only patially, I want/have to know why it is like it is!
Thanks for any "further" discussion.