Panels layout problem

Hi, I tried to set the Panel on the left side, so in "Panel Wizard" I chose "Left column" as page layout and saved this. Now all my Panels are gone. Tried to "Revert " and I tried changing to "Right Column" but still the layout resets to "No Side column". Is this a know bug, or is it just me ? -- if(!Coffee.Exists) { me.Dispose(); throw new NullCoffeeException(); }