<p>My guess would be the lever with the yellow arrow. If you raise the lever up and release, it should go down, it's what I understand locks the door. It could be stuck, may had been dented on the side or maybe some dirt. Try to free the lever................<img src="http://i1284.photobucket.com/albums/a574/king3sparrow/007-copy_zpsnr88kmqb.jpg" alt="" /></p>