We've not used our oven, although I have lit it. If your pilot light is staying lit but the main burner isn't coming on when you turn the temperature up, it may be a bad thermocouple. I'm going from memory here, our trailer is in storage, but typically on gas stoves there is a sensor that should be in the pilot flame (looks like a thick wire, maybe 3/4" long). That sensor has to get hot before the thermocouple will allow gas to flow to the main jet. If the sensor is not in the flame, that would be a problem. If it is in the flame and you can see it's getting red then you probably have a bad thermocouple. Turn off the propane and replace it.
Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE
Most of us don't know exactly what we want, but we're pretty sure we don't have it. -Alfred E. Neuman