WHY WANT MY CANNON CAMBERLEY DOUBLE OVEN 10101G(BROWN) & WHITE(10106G) WORK?

HAVE JUST BOUGHT A SECOND HAND GAS COOKER THE MAIN OVEN DOESN'T LITE THERE DOESN'T SEEM TO BE GAS ENTERING THE MAIN OVEN AT ALL.BOTH THE LARGE HOTPLATES LITE BUT THE 2 SMALL ONE'S DON'T & AGAIN THERE DOESN'T SEEM TO BE ANY GAS COMING OUT OF THEM THE INGINITOR LITES THE 2 LARGE HOTPLATES & THE TOP OVEN SO I DON'T THIN IT'S TO DO WITH THE ELECTRIC'S PLEASE HELP.IT'S A CANNON CAMBERLEY DOUBLE OVEN MODEL NO'S: 10101G (BROWN) & 10106G (WHITE)