Haha chomp, my server is even more buggy!

I can't see the files this wicked server is creating.
I wondered where this beautiful txt files should be, so I tried the example from graal bible a little bit varied:
NPC Code:
function onplayerenters(){
myVar = "HELLO PLANET";
myVar.savestring("levels/file.txt", 0);
player.chat.loadstring("levels/file.txt");
client.text.loadstring("levels/file.txt");
}
Okay... first... player.chat doesn't work - nothing happens.
client.text is my "high lag minimal timeout debug window". client.text=player.chat; brings the player.chat to this window (its just a string)
Okay... second step... debug window shows HELLO PLANET
I dunno why it is like it is, but it is.
Btw. /find file.txt doesnt work even with refreshed file list. It is just not visible... somehow the script read it out nevertheless.
Do I have to set some special server options or to set special folder rights?