Hi,
Please open support ticket and create debug log according to this tutorial which should give us enough information on how MM works with Audiolab 6000N and we can hammer down any issues that arise.

Maybe this is not the place to ask for this topic, but, Is there someone casting to Audiolab 6000N, "directly" from Mediamonkey? By directly, I mean not using DTS Play-Fi app. MediaMonkey does recognizes my Audiolab as an available casting device but it can send a track that is played for only some seconds before issuing an error and jumping to the next track. In Mediamonkey for Android, instead, it plays nicely without the need of loading Play-Fi App.