I have imported the configuratorpanel.cs into my application and use it in a webform
The control works, but the compiler always creates an error in the designerfile..

it doesn't accept the namespace.
even if i comment out the namespace, then it doesn't find the configuratorpanel

<%@ Register TagPrefix="qsf"   Namespace="Telerik.QuickStart"%>
..
                        <qsf:ConfiguratorPanel runat="server" Title="neu" Expanded="false" Orientation="Horizontal" ID="cnfPanel_Folder_Neu">
                            <telerik:RadTextBox ID="tbxFolder_Title_Neu" runat="server" LabelWidth="64px" Resize="None" Skin="Silk" Width="160px" DisplayText="Neuer Order..">
                            </telerik:RadTextBox>
                            <telerik:RadTextBox ID="tbxFolder_Description_Neu" runat="server" LabelWidth="64px" Resize="None" Skin="Silk" Width="160px" DisplayText="Beschreibung..">
                            </telerik:RadTextBox>
                        </qsf:ConfiguratorPanel>

..


and in the configuratorpanel.cs file
----
namespace Telerik.QuickStart
{
    public enum ConfiguratorPanelOrientation
    {
        Horizontal,
        Vertical
    }

    public class ConfiguratorPanel : Panel, IPostBackDataHandler
    {
        protected override void RenderContents(HtmlTextWriter writer)
        {
----