I am trying to program the LED keypad (PC-1555 RKZ) so the number keys act as function keys. The instructions say that if the number is pressed and held for two seconds, it will act as a function key on this model of keypad. I entered *8 [installer code] 000 11 03 04 06 14 16 ## (Page 30 of the instruction guide).. After I finish, the keys do not work as programmed. If I press and hold "2", the ready light will go out but the system will not arm with an exit delay. What am I doing wrong?