viper 5900 issue after one year

The vehicle application is a 2001 F150 supercrew. Thanks to this forum I managed to have a flawless install. I have recently ran into an issue with the security portion of the alarm. My door lock/unlock, auto start, and lighting circuit all work as advertised. I am having an issue with security, meaning if you arm the system and open the door the siren doesnt sound. Also, my led indicator remains constant if the system shows armed/locked. The things I have tried to resolve this issue is, remove the fuse to the system, and check all connectors to the brain. Nothing seems to work. I hope someone can shed some light.

Sorry to waste your time guy's. I just found an old thread that reminded me to check the valet function. That was it. It is still a flawless install.