Well, that's because of the internal "page not found" handling. Some time back we already talked here in the forum about adding custom errorhandling features that would allow us to specify a custom script to call for the "page not found" error. But simply rerouting to the script set under "Home page project name" on "page not found" errors would already be a good thing. So to say.... you are not doing anything wrong. It's just how RB is handling it right now. But I guess this will change sometimes soon.... !?