Hello, my name is Rusty. What is the brand and capacity of your card?
Ok, those cards should work without a doubt. There is a problem with the camera, it's nothing you're doing wrong. Since you formatted the card, and it still won't work, there is a bent pin inside the card slot. You need to use your warranty. Call 800-NIKON-US to get your warranty started. You have done everything you can do at home, and trying to repair it yourself from here will void your warranty.