How do you get your immobilizer to work efficiently on a Renault Megane scenic?

Scenics suffered from leaking sunroof which damaged the reicever for the C/L and immob in the interior mirror. Chech to make sure its not full of water. Apart from that you are stuck with a very poor quality immobilizer from Renault. If its any conselation,there are loads of Renault drivers in same position. Hope this helps.