Refreshing a bar chart

I have an application in which I'm retrieving data using a BAPI and displaying it in a table. I'm using two of the returned fields to display a stacked bar chart using a BusinessGraphics UI element. When the table loads initially the graph displays the values in the first row correctly. However, when I select other rows in the table the graph doesn't update.

I would really appreciate it if anyone can tell me how to get the graph to update when the row selection changes.

Thanks in advance,

Ross