Please paste your Debug information here, so folks can help you the best possible… it is found here: Settings–> My Account–> Help–> Debug information
From the dCS “Plays With Audirvana” category: The link:
dCS is biased to Mosaic in the UPnP protocol implementation… Meaning they want folks to use Mosaic which is a proprietary transmission/communication protocol which may not implement UPnP in a standardized way.