I have a silencer II alarm, with auto unlock and lock the doors when you disarm and arm the car. The alarm still works, but the door locks are not locking/unlocking anymore corresponding with the arm/disarm. What should I look for, or what could be causing this?

The alarm still works and the door locks work, but not in conjunction anymore.

Sorry ahead of time, but this is just a general question, it's for my Mitsubishi.