I'm sorry to trouble you.But I really need your help.I seem to meet the same problem as yours which you had described in "VoIP Audio Service API problem ".
I got a "No source available for "Unknown (0x803A57A8)() " when it run to the following line:
err = iFactory->CreateDownlinkStream(ver,CVoIPUtilityFactory::EVoIPCall,
Have you solve the problem?
I don't how to do now.
Does anyone else know a resolvent?
Thanks very much!