jimmy16 liked a post in a topic by Patch in Lua Plugin 2.00
Now, i know what caused the error!
This is not needed any more: DC():ToUtf8(user:getNick()), because the nicks are good without this.
I writed a simple script, wtich just record all PM to the spamsfile. This nicks recorded without the DC():ToUtf8(user:getNick()) thing: