Use DockSite in UserControl with the new version ActiPro 17.2.665.0

With the version 13 of ActiPro I used a DockSite in UserControl and it's working.

Now I try to use the version 17.2.665.0 (for corect the bug floating ToolWindow).

But my userControl dons't work.

I correct some part of code C# and WPF beacause there are some property changed.

The project compil good, I can see my UserControl in disgn mode xaml, but when I use my UserControl in new Windows I have a problem in disgn mode on xaml.

Error : This operation is invalid since the DockingWindow has not yet been registerd with a DockSite.

StackTrace : ActiproSoftware.Windows.Controls.Docking.ToolWindow.AutoHideCore(Nullable'1 side)

<UserControl x:Class="Aucotec.EngineeringBase.Client.PlugIns.Manufacturing.View.HarnessGraphic2DEditorControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:docking="http://schemas.actiprosoftware.com/winfx/xaml/docking" 
             mc:Ignorable="d" 
             d:DesignHeight="531.333" d:DesignWidth="1282.667" PreviewKeyDown="UserControl_PreviewKeyDown">


    <docking:DockSite Name="dockSiteMain">
            <docking:SplitContainer>

                <docking:Workspace>

                    <Grid>
                        ...

                    </Grid>
                </docking:Workspace>

                <docking:ToolWindowContainer>
                    <docking:ToolWindow Name="twOptions" CanClose="False" Title="{Binding Path=Localizing.GrpSettings}">
                        <StackPanel>
                            
                           ...
                        </StackPanel>
                    </docking:ToolWindow>
                    <docking:ToolWindow Name="twPosition" Title="{Binding Path=Localizing.GrpPosition}" CanClose="False">
                        <Grid>
                            ...

                        </Grid>
                    </docking:ToolWindow>
                </docking:ToolWindowContainer>
                <docking:ToolWindowContainer>
                    <docking:ToolWindow Name="twSelectPath" 
                                    Title="{Binding Path=Localizing.BtnSelectRoutingPath}" CanClose="False">
                        <StackPanel>
                            ...

                        </StackPanel>
                    </docking:ToolWindow>
                </docking:ToolWindowContainer>
            </docking:SplitContainer>
     </docking:DockSite>

   
</UserControl>