immobiliser help 1.8 rsi clio 1996?

hi,when i hit the key fob nothing happens doors dont unlock and immob lights stay on= non starting.ive got a 4 digit code i have a sigma gold shield system,does anyone know how 2 punch that code in or help me get round it without going 2 dealership?your answers will be very gratefull as car has been standing for 4 months i tried changing the sensor near sunroof,disconnecting batterie reconnecting it.