Visual Studio 2005 C++: Office Automation -> Release version crashes

Hi

I try to automate MS Excel via Visual Studio 2005 without MFC. This works if
I run the debug version, but crashes if I run the release build.

Here is my code snippet to initialize COM and Excel:

bool CExcelInterface::initializeExcel()
{
  CLSID clsid;
  HRESULT hr = 0;
  bool bOK = true;
  IDispatch* ipDispatch = NULL;
  do {
    // Initialize OLE for this thread...
    hr = CoInitialize(NULL);
    if (FAILED(hr)) {
      bOK = false;
      break;
    }

    // Get CLSID for our server...
    hr = CLSIDFromProgID(L"Excel.Application", &clsid);
    if (FAILED(hr)) {
      bOK = false;
      break;
    }
    // Start server and get IDispatch...
    hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch,
(void**) &m_pDispApplication)
    if (FAILED(hr)) {
      bOK = false;
      break;
    }
  } while (false);
  return bOK;
}

This works, as I said, in the debug build, but not in the release build. In
the release build it crashes when I execute CoCreateInstance.

- What could be wrong?
- An option in my project?

Thanks for the help
Hans