Report "I have followed the instructions on how to change my entrance code, but am not being successful. I even changed the nine volt thinking that might be the problem. It blinks red quite a bit. Do I have to delete the old entrance code in order to install a new code? I have put in the Programming Code first, then push the Schlage button, put in the number 3, and then put in my new code twice being very careful. What am I doing wrong?!"