Gas Stove, How do I get a larger flame II?

I know for a fact that the house was set up for a propane system. The house was also heated by propane but the furnace and original 500 or 1,000 pound tank was removed. The regulator I have is a low pressure regulator, (probably more geared towards a grill then a house stove). There is no adjustments on the regulator itself. The line was left exposed outside with another regulator attached to it. I had to dig it out of the snow. There is a possibility of moisture in the lines. I've lived around propane stoves all my life and know how high the flames should get. At present I would be lucky if I could use the oven to dehydrate food. It might be able to reach 200 to 250 degrees tops. This is a bit of a cob job as well due to the fact that I couldn't get the right sized fitting between the tank and the regulator. I currently have 2 pieces on it that I believe are cast iron. Everything is tight with pipe tape to ensure there is no leaks. The amount of flow that I have coming out of the end of the regulator is barely enough to feel. Am I doing something wrong, do I need a larger tank with more pressure and a high pressure regulator? The pipe into the house I believe is 1/4" if that helps any. Thank you for the replies to my previous question. You guys obviously know your stuff and I appreciate the help. Jason