Your profile says you have a 1999 MH, most MH's don't charge the chassis battery when plugged into shore power unless you or a PO installed a charging wires running from the house batteries to the chassis battery or a separate battery charger just for the chassis battery. Is this what you have? If that is the case the wire going from the house to the chassis battery may be reversed. All your main wiring could be hooked up correctly as you stated. Before you changed batteries did you chassis battery always charge when you plugged into shore power? Check the voltage coming out of your converter/charger what does it read?