Nostalrius Begins - Quality wow vanilla realm (1.12)

Subject says it all. For some reason whenever I log out anything I changed in the settings doesn't save. While I'm playing, anything I changed in the settings stays until I log out. When I exit the game completely the resolution goes back to default as well as the graphics settings. Why is this happening?

To test : try to edit the config.wtf file and to save the changes. If it says "you dont have the permissions ... blah blah blah" you probably installed the game in a directory protected by the system. In that case, try to move the entire directory at root (eg : c:\nostalrius )