I haven't been able to enter a PIN number and I don't know why. I read the manual where it says that if you haven't entered a PIN number then you can press Done and it will allow you to enter an address. So I did this and stores "Home". I then tried to enter a 4 digit PIN number so that it would recognize me as User1 and it reads back incorrect PIN number. Except how can it be incorrect if I haven't stored one to begin with? What am I doing wrong?