Re: problem regarding ATL connection points...

I have created an ATL service which supports connection points. I have
created a method in my interface called DoTest() and also defined a
callback
interface ItestEvents.

In the client side i am implementing the interface. Following is my client
code.

----------------------------------------------------------------------------------
DWORD dwAdvise;
CComPtr<Itest> pAdd;
hr =pAdd.CoCreateInstance(CLSID_test);

IConnectionPointContainer * pCPC;
IConnectionPoint * pCP;

hr = pAdd->QueryInterface(IID_IConnectionPointContainer,(void **)&pCPC);
hr = pCPC->FindConnectionPoint(IID_ItestEvents,&pCP);

pCPC->Release();
IUnknown *pSinkUnk;
CSink *pSink;
pSink = new CSink;
hr = pSink->QueryInterface (IID_IUnknown,(void **)&pSinkUnk);
hr = pCP->Advise(pSinkUnk,&dwAdvise);
hr = pAdd->DoTest();
pCP->Unadvise(dwAdvise); //call this when you need to disconnect from
server
pCP->Release();
CoUninitialize();
----------------------------------------------------------------------------------

Here the call to Advise() is returning -2147220990. Also my callback event
is not getting fired. I have implemented the callback interface as below

class CSink : public ItestEvents
{
private:
   DWORD m_dwRefCount;
public:
CSink();
virtual ~CSink();
 STDMETHODIMP OnTest(void)
 {
AfxMessageBox("OnTest");
return S_OK;
 }

HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void **ppvObject)
  {
       if (iid == IID_ItestEvents)
       {
           m_dwRefCount++;
           *ppvObject = (void *)this;
           return S_OK;
       }

       if (iid == IID_IUnknown)
       {
           m_dwRefCount++;
           *ppvObject = (void *)this;
           return S_OK;
       }

       return E_NOINTERFACE;
   }

ULONG STDMETHODCALLTYPE AddRef()
   {
       m_dwRefCount++;
       return m_dwRefCount;
   }

ULONG STDMETHODCALLTYPE Release()
   {
       ULONG l;

       l = m_dwRefCount--;

       if ( 0 == m_dwRefCount)
       {
           delete this;
       }

       return l;
   }

};

Please advice where have i went wrong...
Thanks in advance!!!!