Are you sure you are getting it in there far enough? You have to use that little special tool to really push it all the way in. I didn't realize that at first and the card was pushing out on the little door. Then I looked at the little 'key' they give you to open the door and on the other side is a 'tab' that you need to use to really push the card all the way in. Once I did that I didn't have any more problems.