CXTPTabControl display but cannnot change

Hi

We create a CXTPTabControl with the following code. The control is displayed on of the form, but clicking the tabs does not display the relevent child window. The code is copied from the sample for tab manager. What am I missing?

// Create the pages.
m_pageMotorPanel.Create(CInstMotorPanel::IDD, &m_wndTabControl);
m_pageHistoryPanel.Create(CInstHistoryPanel::IDD, &m_wndTabControl);
m_pageFilterPanel.Create(CInstFilterPanel::IDD, &m_wndTabControl);

// Add the pages
m_wndTabControl.InsertItem(0, _T("History"), m_pageHistoryPanel, 0);
m_wndTabControl.InsertItem(1, _T("Filters"), m_pageFilterPanel, 0);
m_wndTabControl.InsertItem(2, _T("Motor"), m_pageMotorPanel, 0);

// Set the display of the tabs.
m_wndTabControl.GetPaintManager()->SetPosition(xtpTabPositionBottom);
m_wndTabControl.GetPaintManager()->SetAppearance((XTPTabAppearanceStyle)3);
m_wndTabControl.GetPaintManager()->SetOneNoteColors(TRUE);
m_wndTabControl.GetPaintManager()->m_clientFrame = (XTPTabClientFrame)0;

m_wndTabControl.ShowIcons(FALSE);