I started assembly of my Cub this eveing. When I plugged the battery in and turned it on, it just started smoking. The battery pack got very hot and melted a hole in the plane covering and unsoldered its own conections on the battery and split the covering. I hooked it up with the brown wire to the brown wire. Its a two wire conection. Did I hook it up wrong? Or was it a bad battery pack. I have the switch hooked in the a Futaba reciever. Does anyone have any ideas?