I have a 1949 Buick Roadmaster Convertible. It has power windows. Currently they all function, but I have a problem getting the windows to go down from the drivers side 4 window control. I can get each window to go up from the drivers door control. Problem is, none of the will go down from that control. I can lower all the windows from the single window controls on the passages door, and rear seat area when I use their individual controls, but can not get any to go down from the drivers door control. Currently the drivers door window is stuck in the up position. Any thoughts?