Binding Combo Box (that is placed within a custom control) Item Source to a Collection View.

 I trying to Bind the item source of the combobox contained within a custom control to a binding list collection view anyone help.  Thanks
Public Property cvLanguage As BindingListCollectionView
        Get
            Return GetValue(cvLanguageProperty)
        End Get

        Set(ByVal value As BindingListCollectionView)
            SetValue(cvLanguageProperty, value)
        End Set
    End Property

    Public Shared ReadOnly cvLanguageProperty As DependencyProperty = _
                           DependencyProperty.Register("cvLanguage", _
                           GetType(BindingListCollectionView), GetType(VolunteerDetail), _
                           New PropertyMetadata(Nothing))
 LanguageTableAdapter.Fill(VolunteerDataSet.Language, "LANG", 0, 0)
        cvLanguage = CollectionViewSource.GetDefaultView(VolunteerDataSet.Language)
<FieldManager:FieldManagerControl.AddNewDetail><StackPanel Orientation="Horizontal"><ComboBox Width="220" DisplayMemberPath="StandardOption" SelectedValuePath="StandardOption_Id"  Foreground="#FF0066DC" FontSize="13" FontFamily="Verdana"><ComboBox.ItemsSource><Binding Path="cvLanguage"><Binding.RelativeSource><RelativeSource Mode="FindAncestor" AncestorType="{x:Type Window}"></RelativeSource></Binding.RelativeSource></Binding></ComboBox.ItemsSource></ComboBox><CheckBox VerticalAlignment="Center" Margin="25,0,0,0" ></CheckBox><CheckBox VerticalAlignment="Center" Margin="25,0,0,0"></CheckBox><CheckBox VerticalAlignment="Center" Margin="30,0,0,0"></CheckBox><CheckBox VerticalAlignment="Center" Margin="25,0,15,0" ></CheckBox></StackPanel></FieldManager:FieldManagerControl.AddNewDetail>