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Error binding scatter chart to XML

Hi there,

I'm having trouble binding a scatter chart to a xml file. If I set the DrawException property to false it works fine, but
setting it to true gives the following exception, which also cause it not to work in Blend:

    "The scatter chart needs ValueX and ValueY. The values have to be set for every data point using ChartParameters collection."

 My xml file looks like this:

     <?xml version="1.0" encoding="utf-8" ?>
      <VALUE X="1" Y="1"/>
      <VALUE X="2" Y="2"/>
      <VALUE X="5" Y="3"/>
      <VALUE X="3" Y="4"/>
      <VALUE X="-1" Y="5"/>



            <XmlDataProvider x:Key="ScatterPlot" Source="Data/ScatterplotData.xml"/>

  <igCA:XamChart  Name="XamChart2"  DrawException="False">
                <igCA:Series Name="chart2" ChartType="Scatter"  DataSource="{Binding Source={StaticResource ScatterPlot} , XPath = /SERIES}" DataMapping="ValueX=X;ValueY=Y" >



 Same thing works fine for column charts etc