SD memory card error?

I have a cannon SD870 IS camera, and I went to take pictures yesterday and it says "memory card error". I read the instructions for the previous user and downloaded the photo recovery software from cgsecurity, and can not get it to work. When I open it, it brings up a DOS looking program and doesn't have my SD card as a selection to chose from. I am not sure this is right? Please help!

Data Reccovery

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