Upgrade to VB5 but can login into forum
 

I've upgrade from VB4 to VB5 but I cant login into forum. The forum are going nowhere.

My forum URL is http://community.siutao.com but when I click forum i goes to http://community.siutao.com/#

I cant also login into admincp via http://community.siutao.com/admincp or http://community.siutao.com/markasadmin (when i rename the admincp into markasadmin)

I can login into admincp via http://community.siutao.com/core/admincp

How can i back to my forum?