Kodak Easyshare V803 "unrecognized file format."

I've had my Kodak Easyshare V803 for about a year and it's worked fine. Last night i took pictures and they were all viewable on the review screen. I just went to go put them onto my computer and there were pictures that were there but blank and not viewable. The file is still there and when i put the memory card back in my camera i get a message on the screen saying "unrecognized file format." How can I get these pictures? These pictures are very important to me.