problem with my furnace please help

[nadiralikhan]

is there anybody who can help me please i am have problem with my furnace it was working fine suddenly it stopped the pilot is working fine and i also bought a new thermostat still the heater is not starting up i hear pilot clicking sound and i can also see the spark please if any body know wahts seems to be the problem is Gas Ignition Controls bad or gas valve or anything else its so cold and i need to get this fix