Gas Stove Lighter I Have A Gas Stove With Electric Lighter,and It Is Working Fine On The Top Burners,but The Oven Wont Light?

I have a gas stove with electric lighter,and it is working fine on the top burners,but the oven wont light? - gas stove lighter

It is a Frigidaire stove, propane burners and the top is good, but the oven light is usual or even let the gas! that the wire is heated, is bright, but is not the gas? Custom and light, no matter try what I do! Can anyone help, please. How much are usually correct? Where can I find parts? and how can I do? every site that I think can help?