Have you tried creating the combination chart yourself?
Create a stacked columns chart, including the series you want to plot as
a line. Then select this series and use Chart > Chart Type to change the
series into a line chart of your choice.
> I am trying to make a combination chart with stacked colums and an overlayed
> line (or data point), just like it is possible to make a combination chart
> with "regular" bars and a line.
Andy Pope, Microsoft MVP - Excel