New Post: checkcombobox grouping

I have added grouping to a checkcombobox. It gets populated and the drop-down displays the items correctly, but I am having trouble getting the selected items to display - after selections are made, only the object reference is displayed in the box, e.g., "CWCB.DataLayer.water_district | CWCB.DataLayer.water_district". The xaml is presented below along with the code-behind which sets the item source to a ListCollectionView. Any hints on what I need to add to the xaml so that the selected items are displayed?

thanks



<xctk:CheckComboBox Margin="5" x:Name="cbDivWaterDist" Width="250" Height="30" HorizontalAlignment="Left" VerticalAlignment="Top"

ItemsSource="{Binding}"  Delimiter=" | " ItemSelectionChanged="cbDivWaterDist_ItemSelectionChanged"                 
    >
    <xctk:CheckComboBox.Resources>
                <Style x:Key="GroupItem" TargetType="{x:Type GroupItem}">
                    <Setter Property="Margin" Value="0,0,0,5"/>
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="{x:Type GroupItem}">
                                <Expander IsExpanded="False">
                                    <Expander.Header>
                                        <StackPanel Orientation="Horizontal">
                                            <CheckBox x:Name="ckhSelectAllDivision" Checked="ckhSelectAllDivision_Checked" Unchecked="ckhSelectAllDivision_Unchecked"/>
                                            <TextBlock Text="{Binding Path=Name, StringFormat=Division: {0}}"></TextBlock>
                                        </StackPanel>
                                    </Expander.Header>
                                    <Expander.Content>
                                        <Border Margin="5,0,0,0">
                                            <ItemsPresenter />
                                        </Border>
                                    </Expander.Content>
                                </Expander>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </xctk:CheckComboBox.Resources>
<xctk:CheckComboBox.GroupStyle>
    <GroupStyle ContainerStyle="{StaticResource GroupItem}"></GroupStyle>
</xctk:CheckComboBox.GroupStyle>
<xctk:CheckComboBox.ItemTemplate>
    <DataTemplate>
        <TextBlock Text="{Binding WD}"/>
    </DataTemplate>
</xctk:CheckComboBox.ItemTemplate>  

</xctk:CheckComboBox>

//during loading event of user control
ListCollectionView lcv = new ListCollectionView(lstDivWD); //lstDivWD is a List<water_district>() populated in the constructor of the user control
lcv.GroupDescriptions.Add(new PropertyGroupDescription("Division"));
cbDivWaterDist.ItemsSource = lcv;


public partial class water_district
{

public string Division { get; set; }
public string WaterDistrict { get; set; }
public string DistrictName { get; set; }
public string WD
{
    get
    {
        return WaterDistrict + " - " + DistrictName;
    }     
}

}