Until you do find a fix here's the way to lock the car,you only have to do this once in a while otherwise you can look your car this way as long as you own it.

With your remote, hit the lock sequence,that will lock both doors the Trunk and the gas door.
Now hit the unlock button one time only, that will unlock the drivers door.
Open the hood, the fuse box at the bottom of the windshield on the driver side under the hood removed fuse number nine, it says alarm interior lights, light ect. Close your hood, locked the drivers door with the key.
Later With the ignition on, if you would like the passenger door unlocked or the trunk ,, hit the unlock button on the dash.

Once you drive the car your trunk and passenger door automatically lock, so if you stop to go into a store, simply lock the drivers door with the key.

There are quite a few cars out there that use the system so we need to find a fix for the problem.I was told It could be the battery in the alarm if you remove your siren you will see that it is so small and sealed,and you wonder how could there be a battery in there, there is,if this battery is bad, it could be the problem. If anyone would like to order a new siren,, install it in their car and if it solves problem than we know what the fix is. jim