If it does run off the street side tank, and won't run off the door side tank, do yourself a favor and order
THIS REGULATOR for the door side tank and get rid of the POS one that came stock on that side.
It is a Marshall Brass C6121#2049 30psi regulator that the Marshall engineer says was spec'd out for an RV dual tank set-up. The one that Keystone uses is a POS, and can't supply enough propane at pressures needed for high demand.
I suspect that this is your problem.
Also, when opening the valve on the new style tanks, you must open them very slowly to prevent the safety valve from stopping the flow of propane from the tank, especially on the door side tank.