Facebook Connect Widget doesn't show

Facebook Connect widget (from Ultimate Facebook) is not showing on sidebar when user is not loged in. When I'm loged in there is my avatar and under "log out" thats ok. But when I push log out, it deasapeare compleately -> not showing (login, register, login with facebook) , it look as the widget is not there, it actually is not there because widget which is normally below Facebook Connect move on it's place. When I login it again show avatar and logout..
Why widget isn't showing properly? is there bug?