I cannot get the firefly sample working properly. Below some of the code of 
luminous.cpp. It passes statement 1. At first I got the error message of 3. 
and now I get blue screens when statement 2. is being executed.

1.        hResult = m_pIWbemClassObject->Put(
                                    bstrPropertyName,
                                    0,
                                    &varPropVal,
                                    cimType
                                    );


 2.       if ( hResult == WBEM_S_NO_ERROR ) {
            hResult = m_pIWbemServices->PutInstance(
                                            m_pIWbemClassObject,
                                            WBEM_FLAG_UPDATE_ONLY,
                                            NULL,
                                            NULL );

3.            if ( hResult != WBEM_S_NO_ERROR ) {
	                   _tprintf( TEXT("Failed to save the instance,")
                                    TEXT(" %s will not be updated.\n"),
                                    lpProperty );


What could be wrong?
Thanks, Gert