CMFCToolBar与CMFCToolBarImages一起使用问题

[mirroatl5]

        m_Imagelist.Create(21,20,ILC_COLOR32 | ILC_MASK,0,0);//CImageList对象

	m_UserImages.CreateFromImageList(m_Imagelist);  //CMFCToolBarImages 对象
	m_UserImages.AddIcon(AfxGetApp()->LoadIconA(IDI_ICON_ONE));//为什么到这就段错误？
	m_UserImages.AddIcon(AfxGetApp()->LoadIconA(IDI_ICON_FOUR));

	UINT nArray[2] = {ID_MENU_ONE,ID_MENU_FOUR};
	m_wndToolBar.SetButtons(nArray,2);  //CMFCToolBar 对象
	m_wndToolBar.SetSizes(CSize(42,42),CSize(32,32));
	m_wndToolBar.SetUserImages(&m_UserImages);

[看不见的裂痕]

可能是ICON和m_Imagelist的创建规格不一致