Merry Christmas everyone. Thanks in advance for your help! I have a (older) Canon Power Shot A530 that needed a new card. So I bought a 4 GB Multi-use Lexar card SDHC and put into the camera and got a locked message. Came here thankfully and found my answer as to how to unlock so now I'm getting a "Memory Card Error" OK so now what I have done? My other camera is not in use and I am not doing anything fancy with this one, just need it to take pics. Can anyone help? thanks again! Maria