If the Ready light is ON, the system is ready for arming. If the Ready light is OFF, check to see that all doors and windows are closed and that motion is stopped in areas covered by motion detectors. The system cannot be armed unless the Ready light is ON indicating that all zones are closed and the system is in the Ready state. To see what zones are open, simply push the [#] button and the keypad displays a number. This is the number zone which is still open or active. Please call our office if you are still having a problem.