IMFActivate::ActivateObject memory leak?

Hi,

I think that there is a memory leak when I execute IMFActivate::ActivateObject.

I found that when method IMFActivate::ActivateObject is executed, the inner COM counter is increased on 1, but when I execute IMFActivate::DetachObject() it is not decreased. I wrote simple test for this. When function CreateVideoDeviceSource() is called with argument activateIMFMediaSource = false method IMFActivate::ActivateObject is not called and Release of IMFActive return 0 - full release and it is OK.

void CreateVideoDeviceSource(bool activateIMFMediaSource)
{

    IMFMediaSource *pSource = NULL;
    IMFAttributes *pAttributes = NULL;
    IMFActivate **ppDevices = NULL;

    HRESULT hr = MFCreateAttributes(&pAttributes, 1);
    if (FAILED(hr))
    {
        goto done;
    }

   
    hr = pAttributes->SetGUID(
        MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, 
        MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID
        );
    if (FAILED(hr))
    {
        goto done;
    }

  
    UINT32 count;
    hr = MFEnumDeviceSources(pAttributes, &ppDevices, &count);
    if (FAILED(hr))
    {
        goto done;
    }

    if (count == 0)
    {
        hr = E_FAIL;
        goto done;
    }

	if(activateIMFMediaSource)
	{
		for(UINT32 index = 0; index < count; index++)
		{

			ULONG eSource = -1;
   
			hr = ppDevices[index]->ActivateObject(IID_PPV_ARGS(&pSource));

			if (FAILED(hr))
			{
				goto done;
			}

			ppDevices[index]->DetachObject();

			pSource->Shutdown();

			eSource = pSource->Release();

			eSource = -1;

		}
	}



done:

	ULONG eDevice = -1;

    for (UINT32 index = 0; index < count; index++)
    {
		eDevice = ppDevices[index]->Release();
    }
    CoTaskMemFree(ppDevices);

	ULONG epAttributes = -1;

	epAttributes = pAttributes->Release();

	epAttributes = -1;

    return;
}

However, when I state argument activateIMFMediaSource = true IMFActive::Release() return 1.

	ULONG eDevice = -1;

    for (UINT32 index = 0; index < count; index++)
    {
		eDevice = ppDevices[index]->Release();
    }

in funtion it calls IMFActivate::ActivateObject and activate IMFMediaSource. I read about using IMFMediaSource and in function it calls IMFActivate::DetachObject(), IMFMediaSource::Shutdown() and IMFMediaSource::Release().

ULONG eSource = -1;
hr = ppDevices[index]->ActivateObject(IID_PPV_ARGS(&pSource));
if (FAILED(hr))
{
   goto done;
}

ppDevices[index]->DetachObject();

pSource->Shutdown();

eSource = pSource->Release();

Ans it is OK - eSource has 0 after calling IMFMediaSource::Release(). But inner COM counter IMFActivate is rised on 1 - and I don't know how to resolve it. I tried to call IMFActivate::Release() two times, but it leads to memory leak. I wrote simple programm - when I call this program with argument function CreateVideoDeviceSource() - true I see on yhe task manager that the size of the memory of progremm rise. When it is called with argument - false - the size of memory is constant.

int _tmain(int argc, _TCHAR* argv[])
{
	HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);

	if (FAILED(hr))
	{
		goto finish;
	}

	hr = MFStartup(MF_VERSION);
	
	if (FAILED(hr))
	{
		goto finish;
	}

	for(int index = 0; index < 100; index++)
	{

		CreateVideoDeviceSource(true);

		Sleep(500);
	}

finish:

	MFShutdown();

	::CoUninitialize();

	return 0;
}

I have spent much time on searching info on MSDN, but did not find any resolvig this problem. Please, help with this situation.