Unable to produce graph -"DataVisualization.dll"

Question

Hello. 

I am using the DataVisualization dll (Silverlight 3 version) by David Anson and everything appears to be working well except the ability to show the actual data points (a white square appears on the screen with a single dot irrespective of the data points I provide) Does anybody know how to resolve? I have pasted some key components of the code. Many thanks

MainPage.xaml

   xmlns:charting="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit"
   xmlns:chartprimatives="clr-namespace:System.Windows.Controls.DataVisualization.Charting.Primitives;assembly=System.Windows.Controls.DataVisualization.Toolkit"
   xmlns:datavis="clr-namespace:System.Windows.Controls.DataVisualization;assembly=System.Windows.Controls.DataVisualization.Toolkit"
  

        <charting:Chart x:Name="Chart">
            <charting:AreaSeries 
                ItemsSource="{Binding}"
                IndependentValuePath="X" 
                DependentValuePath="Y" />
        </charting:Chart>

MainPage.xaml.cs

        // Constructor
        public MainPage()
        {
            InitializeComponent();
            this.Chart.DataContext = new Point[] { new Point(2, 2) }; 
        }