Memory Card Problem

From Oxfordshire, 1 post

I have a XDA1 which I use to take photographs whilst on the road for work. When I get back to the office I use a Kingston card reader to transfer the images to my pc and then delete them from the card. This has worked with no problem until recently. Now when I try to delete the photos from the memory card I get a message that the card is read only and write protected. I have done nothing different from previously. It is costing a small fortune in new memory cards now!! Any advice will be gratefully received