Silverlight 4, DataGrid Image Column.

I am using TelerikRadGridview, but I think there is not much difference for my desire.

.XAML:
 

<telerik:RadGridView Margin="22,77,25,0" Name="radGridView1" VerticalAlignment="Top" Height="450" telerik:Theming.Theme="Windows7" CanUserReorderColumns="True">


            <telerik:RadGridView.Columns>
                <telerik:GridViewColumn Header="ImageDisplay">
                    <telerik:GridViewColumn.CellTemplate>
                        <DataTemplate x:Name="dtTemp">
                            <Image x:Name="ImageDisplay2"/>
                        </DataTemplate>
                    </telerik:GridViewColumn.CellTemplate>
                </telerik:GridViewColumn>
            </telerik:RadGridView.Columns>

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.CS
 

DomainService1 DS1 = new DomainService1();
            radGridView1.ItemsSource = DS1.Descriptions;
            DS1.Load(DS1.GetDescriptionsQuery());

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I want to display Image Column in RadGridview, with URL from the SQL Database.
How can I set Source for this code:

<DataTemplate x:Name="dtTemp">
                            <Image x:Name="ImageDisplay2" Source = HowToSetThisFromDatabase/>
                        </DataTemplate>

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The data is binded by using DomainService.


Please help me this problem.