use CXTPTabControl in dock pane.need help

 i created a CXTPDockingPane. then Attack a dialog into.

//////////////////////////////////  CMCDialog m_wndMainCtrl;//////////
if (m_wndMainCtrl.GetSafeHwnd() == 0)
     {
      m_wndMainCtrl.Create(IDD _MCB,this);
     }
     pPane->Attach(&m_wndMai nCtrl);
////////////////

in the dialog IDD_MCB , there is a Tab Control .

////////////////////

BOOL CMCDialog::OnInitDialog()
{
 CXTResizeDialog::OnInitDialog();

 m_ilTabCtrl.Create(16, 16, ILC_COLOR24|ILC_MASK, 0, 1);
 CBitmap bmp;
 bmp.LoadBitmap(IDB_MCB_TABCTRL);
 m_ilTabCtrl.Add(&bmp, RGB(192, 192, 192));
 m_wndTabControl.SetImageList(&m_ilTabCtrl);

 // create two pages.
 m_wndPageTexture.Create(IDD_MCB_TEXTURE,&m_wndTabC ontrol);
 m_wndPageNodes.Create(IDD_MCB_NODES,&m_wndTabContr ol);
 // insert the page into  xt tabctrl. 
 m_wndTabControl.InsertItem(1, _T("t1"), m_wndPageTexture, 0);
 m_wndTabControl.InsertItem(0, _T("t2"), m_wndPageNodes, 1); 
 m_wndTabControl.ShowIcons(TRUE);
 m_wndTabControl.SetAppearance(xtpTabAppearanceStateBut tons);
 return TRUE;  // return TRUE unless you set the focus to a control
}

////////////////////////////////
the Tab page 1 show fine !
but when we click the Tab item 2 . the XTPTabControl can't Change to Page 2!...

a stupid guy need your help.  thanks!!!!

@_@