Furnace not lighting

[Skater]

Okay, so I finally seem to have the other problem resolved, but now my furnace developed a new one. It comes on correctly, I can hear the gas flow valve opening, and I can watch and hear the ignitor firing, but the furnace doesn't light. All other propane appliances work perfectly.

Am I correct in thinking this almost has to be the gas flow valve, even though I can hear it clicking? It's like it's not letting enough gas into the furnace to light and stay lit. Unfortunately I don't really have a way to test it.

For what it's worth, I never had this problem before; it always lit right up. And it went through several cycles successfully last night before this issue appeared.

[gklabs]

check for rust on the burner pan, mine was rusty, the holes were open but the rust screwed up the flame