I have a propane problem. I am parked in a permanent location so using the propane tank in my motorhome is not an option. I decided to hook up a 20# tank I could easily refill. I put a two stage regulator on the tank since I was bypassing the one on the built in tank. I get propane coming out of the hose from the 20# tank. I do not get any propane to the appliances. It should be a straight open line from the tank to any of the appliances but when I unhook the gas line from the refrigerator or the stove, there is no propane coming out. Has anyone experienced this or has any idea what could be happening?