I did not do anything. Just re-installed the Md11 after a couple of weeks. Applied the FSDT update after that (last Sunday).
Yesterday I got another update info from FSDT, which I installed also.
Now I have another problem: the Cargo MD11 has still the old stair, which shown in the pic. This is the final position.No more move at all.
And the CS777 have now the new stair, but it coming two of them and merging together to this final position.
Peter