Hi all, Just made this account to say this: the error message you are getting is very misleading. It said my devices were offline, much like the topic starter. Here's silly me, thinking it had something to do with port-forwarding like in the old days. But.. of course, it was just a corrupt file! I found "D'Angelo - Soul Mate.mp3.!sync" Once I deleted that, all went well! Just to think all of this could've been solved by a simple, usefull error message.