Thanks a lot Till,
I'm kind of confused. When you say "points to the exact same IP adress" what do you mean ? In my ispconfig enviroment all the webx spaces are sharing the same IP. If I understand, there is an appache directive that handles the received request and knows to which of the webx/web/ files the response is.
Help me with this please, I'm still having the shared ip response when use my new url.