Your camera model requires at least Camera Raw 7.4. PSE 10 Is only compatible up to Camera Raw 6.7. Your choices are to upgrade your Photoshop Elements, or use the free DNG converter to create digital negative copies of your raw files.
Camera Raw 7.4 is not compatible with PSE 10. That version of Photoshop Elements will only accommodate up to Camera Raw 6.7. You will either have to upgrade Photoshop Elements or else use the DNG converter.