How come I cant play one or two levels and it saves?  I have to keep playing otherwise when I go back to the game its still on the same level I was at when I started? I know the book says when you upgrade it automatly saves the game, but not on mine, and one more quick question I just got my unit so I am not sure but when I am done playing the game how do I exit out of the game and back to dsi menu? thanks