The card is not working.

You could to recovery your pictures doing this:

I had the same problem and resolved it using the following program, which you can download from softonic ( is free ) :

http://pc-inspector-smart-recovery.softonic.com/

Is easy to use, you connect your card to de pc (with a pc reader or the camera ), select the card's folder,the file type (jpg) and destination folder for recovering the pictures and finally press init. After that the program will detect that the card is broken and will ask you to do an intensive inspection, answer yes and you'll begin to see your pictures into the destination folder. The process take a time, but is satisfactory.

There is more programs to do his as "card recovery", but no free

try to use a card reader and download all the pictures from the card into a pc...its possible that the card will work into a card reader cause those aren't that sensitive ...after that just format the card in fat ...better try to format it again into the camera if it has the feature...and it probably work...but remember ...download using a card reader...if you do not have one ...ask a friend ..there are a lot of computers that have one installed already ...and there are cheap usb ones too ..EX ; http://www.supermediastore.com/cardreader.html

try a different memory card, and/or try this memory card in another camera or reader

probably you will need to take it to a camera store for diagnosis