@Cameron: Thanks for your Help last time. Now it works.
Here my new Problem: I'm trying to define some new (String-) Variables in the Flash-Memory (NVRAM). I want ot read and change the values of these variables over the web-application. I'm sorry to say, but I have no Idea how it works. Maybe someone can tell me some Information about that or where I can find something about this topic.
I'm thankfull for every help.