Implementation of IRawElementProviderFragmentRoot

Hello, I need your help. I am tring to use UIAutomation with my controls. So, I have:

class MenuProvider : public IRawElementProviderSimple,
                     public IRawElementProviderFragment,
                     public IRawElementProviderFragmentRoot 

And

class MenuProviderItem : public IRawElementProviderSimple,
                         public IRawElementProviderFragment

MenuProvider::QueryInterface looks like this:

IFACEMETHODIMP MenuProvider::QueryInterface(REFIID riid, void** ppInterface)
{
    if (riid == IID_IUnknown)                              *ppInterface =static_cast<IRawElementProviderSimple*>(this);
    else if (riid == IID_IRawElementProviderSimple)        *ppInterface =static_cast<IRawElementProviderSimple*>(this);
    else if (riid == IID_IRawElementProviderFragment)      *ppInterface =static_cast<IRawElementProviderFragment*>(this);
    else if (riid == IID_IRawElementProviderFragmentRoot)  *ppInterface =static_cast<IRawElementProviderFragmentRoot*>(this);
    else
    {
        *ppInterface = NULL;
        return E_NOINTERFACE;
    }
    (static_cast<IUnknown*>(*ppInterface))->AddRef();
    return S_OK;
}

And in my control class I do this thing:

BEGIN_MSG_MAP(...)
    ...
    UIAUTOMATION_MESSAGE_HANDLE_WMGETOBJECT_DEFAULT
    CHAIN_MSG_MAP(...)
END_MSG_MAP()

Where:

#define UIAUTOMATION_MESSAGE_HANDLE_WMGETOBJECT(providerGetter) \
        if (uMsg == WM_GETOBJECT) \
        { \
            bHandled = TRUE;\
            if (static_cast<long>(lParam) == static_cast<long>(UiaRootObjectId)) \
            { \
                lResult = UiaReturnRawElementProvider(hWnd, wParam, lParam, providerGetter(hWnd)); \
            } \
            else \
            { \
                lResult = 0; \
            } \
            if (bHandled) \
                return TRUE; \
        } 

The problem is: MenuProvider::QueryInterface is never asked to give IRawElementProviderFragmentRoot interface (all other are asked), so Inspect Objects see the structure of my control (it's fragments), but it does not react on mose move over control (because MenuProvider::ElementProviderFromPoint (from IRawElementProviderFragmentRoot) never runs).
So, what is wrong?