the old stealthcam 35mm's were junk plus some of the old digitals were junk. however, starting last year I think there cams have been really good. I think the i450 is the best cam out there for the money.

have you tried formatting the card within the camera (there's a way to do it). other then that I would make sure the card isn't locked. hope it works for you!! it's a great cam.