为什么这个STDMETHOD(Load) ( LPPROPERTYBAG pPropBag, LPERRORLOG pErrorLog );函数执行不到呢？该如何解决

为什么这个STDMETHOD(Load) ( LPPROPERTYBAG pPropBag, LPERRORLOG pErrorLog );函数执行不到呢？
我的类这样定义的
class   ATL_NO_VTABLE   CSOActiveX   :  
public   CComObjectRootEx <CComSingleThreadModel> ,
public   IDispatchImpl <ISOActiveX,   &IID_ISOActiveX,   &LIBID_RedOfficeLib,   /*wMajor   =*/   1,   /*wMinor   =*/   0> ,
public   IPersistStreamInitImpl <CSOActiveX> ,
public   IOleControlImpl <CSOActiveX> ,
public   IOleObjectImpl <CSOActiveX> ,
public   IOleInPlaceActiveObjectImpl <CSOActiveX> ,
public   IViewObjectExImpl <CSOActiveX> ,
public   IOleInPlaceObjectWindowlessImpl <CSOActiveX> ,
public   ISupportErrorInfo,
public   IConnectionPointContainerImpl <CSOActiveX> ,
public   CProxy_ISOActiveXEvents <CSOActiveX> ,  
public   IPersistStorageImpl <CSOActiveX> ,
public   ISpecifyPropertyPagesImpl <CSOActiveX> ,
public   IQuickActivateImpl <CSOActiveX> ,
public   IDataObjectImpl <CSOActiveX> ,
public   IPersistPropertyBagImpl <   CSOActiveX   > ,//load
public   IProvideClassInfo2Impl <&CLSID_SOActiveX,   &__uuidof(_ISOActiveXEvents),   &LIBID_RedOfficeLib> ,
public   CComCoClass <CSOActiveX,   &CLSID_SOActiveX> ,
public   IObjectSafetyImpl <   CSOActiveX,   INTERFACESAFE_FOR_UNTRUSTED_DATA   > ,//add
public   CComControl <CSOActiveX>
{
void   sethWnd(   void   );
HRESULT   CallDispatch1PString(   OLECHAR*   sUrl,   OLECHAR*   sArgName,   OLECHAR*   sArgVal   );
HRESULT   CallDispatch1Int(   OLECHAR*   sUrl,   OLECHAR*   sArgName,   int   sArgVal   );
HRESULT   CallDispatch1PBool(   OLECHAR*   sUrl,   OLECHAR*   sArgName,   BOOL   sArgVal   );

public:

CSOActiveX();

HRESULT   CreateFrameOldWay(   HWND   hwnd,   int   width,   int   height   );
HRESULT   GetUnoStruct(   OLECHAR*   sStructName,   CComPtr <IDispatch> &   pdispResult   );
HRESULT   LoadURLToFrame();
HRESULT   HideAllBars();
HRESULT   setStartModel(   int   iModel   );
HRESULT   GetUrlStruct(   OLECHAR*   sUrl,   CComPtr <IDispatch> &   pdispUrl   );
STDMETHOD(SetClientSite)(   IOleClientSite*   aClientSite   );
STDMETHOD(Load)   (   LPPROPERTYBAG   pPropBag,   LPERRORLOG   pErrorLog   );

DECLARE_OLEMISC_STATUS(OLEMISC_RECOMPOSEONRESIZE   |  
OLEMISC_CANTLINKINSIDE   |  
OLEMISC_INSIDEOUT   |  
OLEMISC_ACTIVATEWHENVISIBLE   |  
OLEMISC_SETCLIENTSITEFIRST
)

DECLARE_REGISTRY_RESOURCEID(IDR_SOACTIVEX)

BEGIN_COM_MAP(CSOActiveX)
COM_INTERFACE_ENTRY(ISOActiveX)
COM_INTERFACE_ENTRY(IDispatch)
COM_INTERFACE_ENTRY(IViewObjectEx)
COM_INTERFACE_ENTRY(IViewObject2)
COM_INTERFACE_ENTRY(IViewObject)
COM_INTERFACE_ENTRY(IOleInPlaceObjectWindowless)
COM_INTERFACE_ENTRY(IOleInPlaceObject)
COM_INTERFACE_ENTRY2(IOleWindow,   IOleInPlaceObjectWindowless)
COM_INTERFACE_ENTRY(IOleInPlaceActiveObject)
COM_INTERFACE_ENTRY(IOleControl)
COM_INTERFACE_ENTRY(IOleObject)
COM_INTERFACE_ENTRY(IPersistStreamInit)
COM_INTERFACE_ENTRY2(IPersist,   IPersistStreamInit)
COM_INTERFACE_ENTRY(ISupportErrorInfo)