I think I accidentally locked my memory card on my Canon PowerShot SD1100. When I turn it on it says "Memory Card Locked." It displays this message when the little lock on the side of the card is in both the locked and unlocked positions. I am hoping to reformat or do something to allow me to use my memory card. When I click the menu button on my camera, it does not allow me to select the "format" option on the menu.