Thank you, this setup is only used for troubleshooting, that is why i make public access to the admin account, but thanks anyway for your advice hnla. any idea how can make the link works. btw, if i set the theme to be buddypress default, all work, and if i use suffusion in Windows system, it works also, only in linux(ubuntu 10.04), i even set all the file and directory to be mod 777, still cannot make it work.