Load and Save CDialogBar

Hello,
I tried to load and to save CDialogBar based on the Knowledge Base's article "How To Save and Restore State of Dockable Toolbars."  However, I can't seem to get this to work.  I embedded my CNewSldClass dialog bar which is derived from CMyOwnDialogBar inside my CMDIChildWnd code.  CMyOwnDialogBar is derived from CDialogBar.  I get an assert failed in DOCKSTAT.CPP line 477.  Following is an excerpt of my code in the CMDIChildWnd:
int CChildFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
      if (CMDIChildWnd::OnCreate(lpCreateStruct) == -1)
            return -1;
      // TODO: Add your specialized creation code here
      //allow docking to left, right and bottom
      DWORD dwStyle = CBRS_TOOLTIPS|CBRS_FLYBY|CBRS_SIZE_FIXED;//CBRS_SIZE_DYNAMIC for allowing size change
      if (!m_wndPaletteBar.Create(this, IDD_DIALOGBAR1_DIALOG,
                                                dwStyle,
                                                IDD_DIALOGBAR1_DIALOG, FALSE))//TRUE to create sizeable CDialogBar
      {
            TRACE0("Failed to create dialog bar\n");
            return -1;      // fail to create
      }
      if (m_wndPaletteBar.CreatePaletteToolbar() == FALSE)
      {
            TRACE("Failed to create toolbar.");
            return -1;
      }
      m_wndPaletteBar.SetCaptionText("Tools");

      //create the slide
      dwStyle = CBRS_TOOLTIPS|CBRS_FLYBY|CBRS_SIZE_DYNAMIC;//CBRS_SIZE_DYNAMIC for allowing size change
      if (!m_wndSlideBar.Create(this, IDD_DIALOGBAR2_DIALOG,
                                                dwStyle,
                                                IDD_DIALOGBAR2_DIALOG, TRUE))//TRUE to create sizeable CDialogBar
      {
            TRACE("Failed to create dialog bar.\n");
            return -1;      // fail to create
      }
      if (m_wndSlideBar.CreateStudyFolder(NULL) == FALSE)
      {
            TRACE("Failed to create slide toolbar.\n");
            return -1;
      }

      m_wndSlideBar.SetCaptionText("Slides");
      EnableDocking(CBRS_ALIGN_LEFT | CBRS_ALIGN_RIGHT | CBRS_ALIGN_BOTTOM);
      DockControlBar(&m_wndPaletteBar,AFX_IDW_DOCKBAR_RIGHT);
      DockControlBar(&m_wndSlideBar,AFX_IDW_DOCKBAR_LEFT);
      // we need to do that ourseleves.
      LoadBarState(_T("DockState"));
      RecalcLayout();
      return 0;
}

I called the SaveBarState(_T("DockState")) in the OnClose() of CMainFrame.  I hope someone can help me with this problem.

Jennifer