DockingPane - NullReferenceException

It seems that I get the NullReferenceException error when I set the MDIParent of the form that contains the DockingPanes.  If I remove that line then the form launches fine.

Now the question is, can the docking panes NOT be used on a child form in an MDI app?

Thank you for the reply.  I thought of looking at that example as I was falling asleep last night.  I should have thought of that sooner.

Sorry if this post turns out to be a bit long. 

I have it working to where the form with the docking panes opens as a child of the MDIContainer (which itself does not have a docking pane manager) but the events I set up for the DockingPaneManager are not getting fired off when I create the Pane Objects.  (.GetClientBordersWidth, .AttachPaneEvent...) 

I no longer get the NullReferenceException error and some lines of debug code I put in after creating the Panes show they are not null.  But when my form opens the calendar object (the client part of the DockingPaneManager) is the same size (small) as it is in Design view and there are no panes.

I am pretty sure this is because the events for the DockingPaneManager are not getting hit. 

Are the main differences between the SDI and MDI examples that the MDI example has the "foreach (Control ctrl in this.Controls)..." loop in frmMain that calls SetMDIClient, for a form set to be an MDIContainer - and then putting the initialization of the DockingPaneManager control in the Load of the form with Docking Panes that is to be the child form, as in frmDocument?

Is there something else I am missing?

Again, thanks for the help.

Here is the Load of my child form:
private void frmCalendar_Load(object sender, EventArgs e)
        {
            //
            // DockingPaneManager
            //

            this.DockingPaneManager = new AxXtremeDockingPane.AxDockingPane();
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(frmCalendar));
            ((System.ComponentModel.ISupportInitialize)(this.DockingPaneManager)).BeginInit();
            this.DockingPaneManager.Enabled = true;
            this.DockingPaneManager.Location = new System.Drawing.Point(58, 233);
            this.DockingPaneManager.Name = "DockingPaneManager";
            this.DockingPaneManager.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("DockingPaneManager.OcxState")));
            this.DockingPaneManager.Size = new System.Drawing.Size(24, 24);
            this.DockingPaneManager.TabIndex = 16;
            this.DockingPaneManager.ResizeEvent += new System.EventHandler(this.DockingPaneManager_ResizeEvent);
            this.DockingPaneManager.AttachPaneEvent += new AxXtremeDockingPane._DDockingPaneEvents_AttachPaneEventHandler(this.DockingPaneManager_AttachPaneEvent);
            this.DockingPaneManager.GetClientBordersWidth += new AxXtremeDockingPane._DDockingPaneEvents_GetClientBordersWidthEventHandler(this.DockingPaneManager_GetClientBordersWidth);
            this.DockingPaneManager.Action += new AxXtremeDockingPane._DDockingPaneEvents_ActionEventHandler(this.DockingPaneManager_Action);

            this.Controls.Add(this.DockingPaneManager);
            ((System.ComponentModel.ISupportInitialize)(this.DockingPaneManager)).EndInit();

            DockingPaneManager.ScaleMode = XtremeDockingPane.XTPScaleMode.xtpScalePixel;

            // create side tabbed panes
            CreatePaneObjects();
}

Here is  CreatePaneObjects():

private void CreatePaneObjects()
        {
            //Determine if Alpha Context is supported, if it is, then enable it
            //Determine if Docking Stickers is supported, if they are, then enable them
            if (Environment.OSVersion.Version.Major >= 5)
            {
                DockingPaneManager.Options.AlphaDockingContext = true;
                DockingPaneManager.Options.ShowDockingContextStickers = true;
            }
            else
            {
                DockingPaneManager.Options.AlphaDockingContext = false;
                DockingPaneManager.Options.ShowDockingContextStickers = false;
            }
          
            DockingPaneManager.Options.ShowCaptionMaximizeButton = true;

            Pane curMo = DockingPaneManager.CreatePane(0, 207, 159, XtremeDockingPane.DockingDirection.DockLeftOf, null);
            curMo.Title = CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(DateTime.Now.Month);
            curMo.MinTrackSize.SetSize(201, 153);
            curMo.MaxTrackSize.SetSize(210, 159);
               
            DockingPaneManager.Options.ThemedFloatingFrames = true;
}