How can I fix my citroen syinergie 2.0 8v petrol immobiliser?

The engine will turn over but no spark so I take it that it is the immobiliser. I have changed the engine wireing loom as it was corroded in many places. If I lock the doors the indicators flash once and the red light on the dash flashes on and off. When I unlock the doors the indicators flash about 8 times! is this right. Can I bypass the immobiliser or reset it some how. My key has no buttons but has the chip inside. HELP ME someone.