Error in DockingDemo

i've tried to add a ON_WM_RBUTTONDOWN() event function to display a popup menu in the TreeCtrl controls (CTabClassTree)  when the right mouse button is pressed.
The function is

    CPoint pt = point;
    ClientToScreen(&pt);

    CXTMenu menu;
    VERIFY(menu.LoadMenu(IDR_POPUP));

    CXTMenu* pPopup = menu.GetSubMenu(0);
    pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, pt.x, pt.y,
        this);

IDR_POPUP is a simple menu with ID_EDIT_COPY, ID_EDIT_CUT, ID_EDIT_PASTE

when the menu is displayed the icons of Copy Cut Paste  are not visible. Only changing the CWnd owner parameter in the TrackPopupMenu call to CFrameWnd the icons are loaded.

In a program of mine i need to show the icons but also link the menu item selection to some functions in the TreeCtrl class, so i cant make CFrameWnd the owner.

How i can fix this?

Thanks