I bought one brand new at cabela's and same thing happened to mine. It was last year model with the 6volt battery.

It said "card locked", but the card was not. I called the Moultrie cuatomer service and the nice lady said that something must be wrong with the card reader. I sent the unit back as per her directions.

I received an entire new camera about 3 weeks later.

Call them and see what happens

bhw