Treeview databinding problem associating an icon to each node

Question

Hi all I am new to wpf and need to use the treeview in a real world application and was building something simple beforehand to get a feel.

I am loading countries and cities and dont have to be loaded on demand for now I cannot seem to associate an icon for the city and an icon for the country. Created a folder called images and successfully binded the image to city but cannot seem to bind it to country can you see what's wrong?

        <DockPanel>
    <TreeView ItemsSource="{Binding Countries}">
        <TreeView.ItemContainerStyle>           
            <Style TargetType="{x:Type TreeViewItem}">
                <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
                <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
                <Setter Property="FontWeight" Value="Normal" />
                <Style.Triggers>
                    <Trigger Property="IsSelected" Value="True">
                        <Setter Property="FontWeight" Value="Bold" />
                    </Trigger>
                </Style.Triggers>
            </Style>
        </TreeView.ItemContainerStyle>

        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate ItemsSource="{Binding Cities}">
                <StackPanel Orientation="Horizontal">
                    <Image Width="16" Height="16" Margin="3,0" Source="Images\City.png" />
                    <TextBlock Text="{Binding Name}" />
                </StackPanel>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>

    </TreeView>
</DockPanel>

thanks a lot