how can i reset my immobiliser?

I have a renault clio RL paris (1997) and just recently the immobiliser stays on and the car will not start. When i put the key in the ignition and turn the key it just clicks and will not turn over, there is nothing there just a click. I have looked on another site and found a method involving entering a 4 digit code to bypass the immobiliser by using the central locking button. So using my car type no and key id i got the code for my car but when i hold down the central locking button for a few seconds the light goes out altogether instead of turning to the slow flash described in the instructions. Does anyone know how i can get the slow flash of the red light so i can enter this code its getting very annoying knowing the car is in full working order apart from this problem.