[flexcoders] How can I add a SeriesInterpolate effect with actionscript to my PieChart?

[sailorsea21]

MXML:
<mx:SeriesInterpolate id="action" duration="1000" minimumElementDuration="200"/>

ACTIONSCRIPT:
var pie:PieSeries = new PieSeries();
pie.setStyle("showDataEffect",action);

Does anyone know why the following doesn't animate my chart? Thanks.