PageLines WitheHosue problem

Hello Everyone, I got runing in my server wordpress 3.0.1, I got this problem hope you can help me solving it.
I just installed a theme (WhiteHouse), works great, after a few hours editing, decide to log out, and see it without the edit tags in posts or pages.
Sudenly instead of the log-out function this message appears “Sorry, but you don’t have the administrative privileges needed to do this.”
I can’t acces to Index, admin, login, nothing, the same message again and again and again. What could it be? My hosting provider says that’s my worpress instalation, I think is the theme.