Just hooked a 100lbd tank the gas log set in my house. They have never been used since the house was built in 2002. I’ve managed to get the pilot going but when I turn the switch on I cannot get the main flame to come on. There are two switches on the wall; one I assume turns the main flame on the other turns on the blower. There is a plug under the unit that the blower plugs into, which does have power on and off depending on the wall switch. What am I missing here? They are propane.