In case some of you want to know this:
After reinstalling the whole SD Card the same problem occurs. After some… temper tantrum found out that nc-passwd doesn’t work. Used standard passwd (passwd ncp). Worked fine 
In case some of you want to know this:
After reinstalling the whole SD Card the same problem occurs. After some… temper tantrum found out that nc-passwd doesn’t work. Used standard passwd (passwd ncp). Worked fine