Custom ItemTemplate problem

[Aeroth]

Hi Telerik support,

My purpose is that I need my ComboBox that can display both value and description (highlight), so I created my custom item template.
But, when I set the ComboBox IsEnabled to false, the ComboBox just dispeared, Did I go anything wrong or miss anything?

code snippets:

public class MyRadComboBox : RadComboBox
        {
            public MyRadComboBox()
            {
                DataTemplate selData = (DataTemplate)XamlReader.Load(
              @"<DataTemplate
                        xmlns=""http://schemas.microsoft.com/client/2007"">
                        <TextBlock Text=""{Binding Value}""/>
                </DataTemplate>"
              );

                DataTemplate itemTmp = (DataTemplate)XamlReader.Load(
                    @"<DataTemplate
                        xmlns=""http://schemas.microsoft.com/client/2007"">
                    <StackPanel Orientation=""Horizontal"">
                        <TextBlock Text=""{Binding Value}""/>
                        <TextBlock Text="" ""/>
                        <TextBlock Text=""{Binding Description}"" Foreground=""Blue"" />
                    </StackPanel>
                </DataTemplate>");


                ItemsPanelTemplate itemsPanelTmp = (ItemsPanelTemplate)XamlReader.Load(
                    @"<ItemsPanelTemplate
                        xmlns=""http://schemas.microsoft.com/client/2007"">
                    <VirtualizingStackPanel />
                </ItemsPanelTemplate>");


                base.SelectionBoxTemplate = selData;
                base.ItemTemplate = itemTmp;

                base.ItemsPanel = itemsPanelTmp;

                base.SelectedValuePath = "Value";
                Telerik.Windows.Controls.TextSearch.SetTextPath(this, "Value");
            }
        }

public class MyComboBoxItem
        {
            public string Value { get; set; }
            public string Description { get; set; }

            public object DataContext { get; set; }

        }

public class MyComboBoxItemCollection : ObservableCollection<MyComboBoxItem>
        {
            public MyComboBoxItemCollection()
                : base()
            {
            }
        }

Thanks!