I have WPF application RadCartesianChart

This is the code of one of them......

<telerik:RadCartesianChart x:Name="RadChart1" Palette="Windows8" DataContext="{Binding XPath=/Nodes/Node,Source={StaticResource xml_Chart}}">

<telerik:RadCartesianChart.HorizontalAxis>
<telerik:CategoricalAxis Background="#FFF50000" />
</telerik:RadCartesianChart.HorizontalAxis>
<telerik:RadCartesianChart.VerticalAxis>
<telerik:LinearAxis />
</telerik:RadCartesianChart.VerticalAxis>
<telerik:RadCartesianChart.Series>
<telerik:BarSeries CategoryBinding="{Binding XPath=@shortTime}"
ValueBinding="{Binding XPath=Item/@value}"
ItemsSource="{Binding}" ShowLabels="True">
</telerik:BarSeries>
</telerik:RadCartesianChart.Series>
</telerik:RadCartesianChart>
=============================================================

I want to work with xml..

<telerik:BarSeries CategoryBinding="{Binding XPath=@shortTime}"
ValueBinding="{Binding XPath=Item/@value}"
ItemsSource="{Binding}" ShowLabels="True">
</telerik:BarSeries>

I can not run it. Help..... Thanks.