Aid! Chevrolet Optra 2008 alarm

First of all, receive a cordial greeting. Well, we use the grain:

the problem as indicated in the title is with Optra Year 2008 automatic. The fault has me crazy, the vehicle through the Chevy button of the alarm control, opens and closes the insurance of the doors, I even opens the suitcase, active and deactivates the sound alarm. But when the vehicle is going to be turned on, it is where the fault presents, by introducing the 5 -digit key and pressing the Chevy button nothing happens. Normally when introducing the key, the immobilizer is deactivated and ignited the dashboard lights, the gasoline pump works and the car can turn on; When one introduces an incorrect 5 digit key, the alarm begins to sound, but in this case none of that happens, and that is the problem, in summary the control opens and closes the doors, but does not disable the immobilizer by means of the 5 -digit key. The control lights the red LED when pressing the buttons so I presume that the control is fine. I appreciate the help you can give me. Greetings.

Hello, the control buttons precisely one by one if the light binds intermittently, it is fine if the light is fixed the battery is poor, if so, the battery of the control is renounced and then reprogram them so that they have a good resection, if the prodlema continues to reprote the controls rename the Chevy Alarm module. That's all Horden.