I have several domains on my vps and they run seperate installs of wordpresses on it. rootdomain.com have seperate install of basic wp. then i have addondomain.com where i installed wpmu. all went fine with installing. with both of em. now i checked wpmu and tried to register site to it. it registers fine, but when i try to activate my site sub.addondomain.com it just redirects it to rootdomain.com/wp-login.php while it should go addondomain.com/wp-login.php. what im missing here?