HOW TO DISABLE ESCORT IMMOBILZER?

MY CAR WILL NOT START LIGHTS ON DASH BOARD EVERYTHING COMES ON BUT WHEN I TRY AND START IT THERES NOTCHING THERE WILL NOT TURN OVER AND I NORMALLY HEAR THE ELECTRIC FUEL PUMP BUT THE RED IMMOBILISER LIGHT DOSENT GO OUT IT KEEPS FLASHING ANY IDEAS HOW TO BY PASS IT OR START IT THANK YOU ITS A 1.6 16V ZETEC ENGINE A ELECTRICIAN CHECKED ALL CERCUITS AND EVERYTHING IS GOOD SO HE SAYS THE IMMOBILISER IS STUCK ON OR GET A NEW ECU CAN I DO THAT