i've got the same problem!
apparently you need a new part (so says my friendly and cheap gas repair man!)
a 'ffd' which is the valve that lets the gas through
am looking into prices but the onlt one i've had back is £166.81 plus vat and p&p
what a rip off!
from preston gas supplies 01772 702 755
lovely oven though!
hope this helps
alce, February 2007