Here are the instructions I used. It also took me a few tries, but I did get it to work.
Good Luck,
Carl
Changing the User Code
The unit is shipped with a default user code of 1234, but can be changed
to a 3-7 digit number. To change the user code:
1. Press the 9·0 button for approximately 3 seconds. Keypad lights
should flash twice then stay on.
2. Enter the current user code. When entering the last digit of the
current user code, hold the button for approximately 2 seconds.
Keypad lights should flash once then stay on.
3. Enter the new user code. When entering the last digit of the new
user code, hold the button for approximately 2 seconds. Keypad
lights should flash once then stay on.
4. Repeat the new user code. When entering the last digit of the
new user code, hold the button for approximately 2 seconds.
5. Keypad lights should flash once then turn off. The user code has
been successfully changed.
If the keypad lights turn off during Steps 1-4, then programming has been timed out and the process needs to be repeated from Step 1.