CARD IS LOCKED ON MY

I have a Canon A650 that was displaying a "card locked!" message. First, take out the card and check small the lock tab on the side of the card itself. Then, try a different SD card in the same camera. I tried an old 256 MB card from an older camera. I still got the "card locked" message. When I put the 1 GB card I was struggling with in my old Nikon, it read fine. So at this point I knew it was my camera and not the card. What finally worked for me was very gently pressing down on the metal flap inside the card chamber that detects the lock with the tip of a straightened paperclip. Hope this helps.