Locked card in my camera?

Remove the card from the camera and see if there's any kind of switch on the card. If so, move it and replace in camera.

You need to first remove the memory card from your camera. On the little memory card itself, you will notice there is a tiny plastic slide that can go one way or the other. In one direction, the card is 'locked' and in the other direction it is not. Slide it to the opposite direction it is currently in, and re-install in the camera and you should be all set.