I solved the color problem a few weeks ago, just I didn't have the time, to write it down jet.
So the main problem was about my predefined color names. I recognized in the wiring diagram, that the wires have a primary color of "M", but this color doesn't exist in my color codes, but my predefined color codes were all "M-Bl", "M-Rd" etc. so it seemed, VeSys doesn't support dash mark in color codes, and of course that was the problem. So if you are defining colors your own, don't use a dash mark, I hope this will be helpful for someone.