6v6gt:
What about just hard coding the SSID and password in your sketch as a first step in problem solving.
If even that fails, the problem lies elsewhere.
I cant hard code it. That the point 
With hard coded ssid/pass it work of course.
With newline setting in SM it works, Ill implement @J-M-L ideas to make it more "general".
Now I have problem with the C# application sending these data. But that's for another topic.
Thx guys.