Are you sure the card is plugged in all the way? The top edge of the card has to be pushed in sometimes slightly past the opening in the case using your fingernail. If you listen carefully, you’ll hear a faint click when the mechanism grabs the card. Release pressure slightly, and you’ll hear a 2nd click when it’s locked in position. To release the card, do the same thing; push in unitl it clicks, then ease up the pressure and the spring will eject the card. Don’t take your finger off of it though, as it will launch the little bugger across the room!
Not saying this is definitely your problem, but it could be. Happened just a few days ago here with someone else.
