Got a new safe delivered today. A liberty Colonial 50. Anyhow it has a mechanical lock and as soon as the delivery people left I shut the door locked it then put in the combination to open it and nothing.. It didn't work. I read the directions (afterwords of course) that you should test the combination with the door open.. After hours of playing with it I finally got it opened. Combination sent from the factory was 3 digits off for the middle number... Word to the wise.. test your new safes with the door open.