I can't save my game! Whenever I save and turn it off, the next day when it loads there is a message that says, "Your memory card is corrupted and needs to be formatted." So I clicked yes and it deleted the game. More importantly, THE ENTIRE MEMORY CARD DATA!!! I checked and all of the memory was gone! All of the hard work was deleted! I only had 6 games on it though. Can someone help me and explain what happened?