I'm trying to build a line chart (MSLine.swf) and I want my lines to be dashed (or dotted).  I see I can apply the dashed attribute to a trend line <vLine dashed='1' />.  I also can add the dashed attribute to the dataset <dataset dashed="1">.  When I apply this attribute to the dataset for a chart area (MSArea.swf), I get the result I want. 
  
Is this feature NOT supported for line charts? 
  
What am I missing?