Car is succesfully unlocking (with two beeps) just for 5-10 minutes after I locked it. But then I lock the car(beep once) and leave it for more than 10 minutes, car isn`t unlocking succsefully. I don`t know why ? If the car didn`t beep for unlocking (two beeps), only lights flash, it means that the alarm will turn on for two seconds when I close the doors or start the engine. What is the problem with that ? Thank You for a reply.