Opel Corsa

Hello greetings beforehand ... well I explain what happens is that I have an Opel Corsa that I do not have to start but I do not part when giving contact I flash the light of the check Engine
the strange thing is the following

if I give it contact and I wait a bit to start it does not see myself and turn the engine.

But if I start from once quickly part 3 second flashes the light and stops

some type of blockade in the sheet? Or will it be that where does any code have the computer does not start? I croe that something in the sheet must see or some safety block ... I hope you answer me if you save something from the hands thanks

I almost have no doubt that what the engine is stopping is the immobilizer, I should try another key. It is convenient to scan the car to see that the components functions well and re cow the keys.