thefrees, You really should post this question in the Digital Cameras Forum. Here's the link to it.
I had my camera on and it was working fine. Then i turned it off because I wasn't using it. Then when I went to turn it back on, it said "This card cannot be used". I am not able to view pictures, take pictures, or download them to my computer. When i tried to download my pictures to my computer, it wouldn't even show up as connected to my computer. Is there a way to fix this?