I just installed a new Bradford 40 gallon water heater model M-I-403S6FBN and the pilot light ignited just fine but when I turn up the dial to "Hot" or "A" "B" or "C" tetmperature settings- it will not increase the flame to heat water. The pilot light is actually a bigger flame then the flame I get when I turn it up. In other words the flame size decreases when I turn the dial from Pilot to a heat setting. I used the same water connections as my old one and the lines are the same - tank filled just fine, the gas line is the same also. The only thing I replaced is the gas connection line as the old one was crimped. What could be causing this? The pilot stays lit but the burner will not fire up?