renault clio 1.2gl 2000 reg x?

hi can you help i brought a renault clio 1.2 1999 it was not runing when i got it
the headgaset needed doing i have done the headgaset and the car turns over but
it has no spark i have looked on the net people say that it could be the ecu or the immobiliser
the light gose out for the immobiliser on the dash when i turn the key. the coil pack works and the fly wheel sensor works because i tryed it on different car so i think it could be the ecu.please can you help thanks andy

andrew
October 2008