My D700 will not let me format a card or update the firmware. When I try to use the functions the 'Yes' to proceed is highlighted in Red and will not function. Has anyone else had these problems? I can take a picture, but , who knows if the camera is really functioning correctly. I can delete pics on the card one at a time. Also the picture bracket is grayed out. It's almost like it is dying a slow death, it should be no where near that. Thanks...Leatha