Disconnected and removed a battery from a 2005 focus to charge it (weather too rotten to try charging in the car). When I reinstalled the battery, the factory tamper alarm goes off (horn sounds and lights show), but will not turn off using the unlocker (4 button-lock, unlock, red button, blue button). Car key not helpful. Any ideas what causes?? What will fix? The car is a 2005 Focus ZX4 SE 2.0 engine.