Unlocking door problem

I have installed a prostart ct-3100 autostart in a 1996 Pontiac Grand Prix. It works good except when the engine turns off, either by touching the brake or by time out, the doors unlock. Can I do something to prevent this.

Thanks

Thanks for the suggestions. The car doesn't have an alarm, but the doors unlock automatically when the key is turned off. Maybe I can somehow bypass this.

Thank again

If anyone else has this problem I figured out a fix, sort of. I connected the re-arm wire from the module to the lock relay. I used two diodes to prevent a pulse going to the module also. After time out or remote shutdown it gives a 1 sec pulse 4 seconds after shutdown.

Thanks for replying back.

Thank You Jeff

And I would not have been able to get the unit working if not for your site.