My gas fire wont buoyant? i push the button in on my gas fire but i cant...

i push the button in on my gas fire but i cant hear it ignite, so the fire wont reading light, can someone please tell me what the problem can be, gratitude
Answers:    Depends on the make/model of fire - could be the thermocouple needs replacing , dirty spark ignition, dirt blocking the jet or with some that whip batteries for ignition that the battery-operated needs replacing xxxx
Make sure the gas is turned on, or perchance the ignition piece is dirty.