M1 armed in night mode but alarm doesnt go off when violated


Active Member
I have had the alarm go off before when I open a door but this morning the system was armed in night mode and I opened the door and the alarm didnt go off.  I did this with all doors and same thing.  I disarmed the system and opened the doors and it shows violated.  Any idea what happened?
Sorry, I noticed the doors were set to burglar interior.  I switched it to perimeter and it works.  Thanks