[xwiki-users] My xwiki login page always redirects to localhost

Hi, all, I got a problem with our xwiki site setup, I have apache webserver and tomcat behind with xwiki 3.5 deployed, when I do login, logout or clicking buttons on the server machine browser with http://localhost:8082/xwiki/bin/login/XWiki/XWikiLogin, I can login, everything works fine, but if I use external public internet to access our xwiki site like: http://mydomain.com/xwiki/bin/login/XWiki/XWikiLogin, I got the login page shown up, but if I login, it redirects me to localhost/xwiki/bin/view/Main/WebHome, which points to my localhost, not my server mydomain.com machine, then from the browser address bar, if I change the localhost url to this url: http://mydomain.com/xwiki/bin/view/Main/WebHome, I can see the page correctly. Hers is my httpd.conf file setup: ProxyPass /xwiki http://localhost:8082/xwiki ProxyPassReverse /xwiki http://localhost:8082/xwiki Any clue what is going on? Thanks Dave