Oven won't work. This is a propane oven. The ignition in the oven turns on, but there seems to be

Question

This is a propane oven. The ignition in the oven turns on, but there seems to be no gas flow that creates the heat after the electric start. Three of the top burners do not start with the electronic ignition. One does. We use the other burners by lighting a match. We live out in the country and it is very expensive to hire someone to come out here. Is there anything we can do to get the oven to work? I am mostly concerned about getting the oven to work. I don't mind doing the manual start on the top burners. I would greatly appreciate any help you can offer. Thank you very much, Karen