Try restarting your laptop and then attempt to use the card again. If not try another card reader or laptop. If that fails then I'm not sure there's much that you can do, there are some data recovery shops out there but they're very expensive and I'm not sure that they work on flash memory. The card may simply be unfixable and you'll have to accept the loss of data. Here's a guide that may direct you in the right manner in order to try and recover some of the files. http://www.pcadvisor.co.uk/how-to/storage/3481659/how-get-files-off-corrupt-sd-card/
