Hi,I have a Valor Dream gas fire that will not stay alight.I had this problem a couple of years ago and changed the Thermocouple/Pilot Assembly.It worked fine then but replaced with new again and still will not stay alight???. Excluding the possibility that the new Thermocouple/Pilot Assembly is also faulty could the fault lie elsewhere ????. Just to re-cap. The fire ignites ok and stays on whilst holding the slide down but goes off as soon as it is released.Any advice would be greatly appreciated.Thanks.