After not using my Sonos for an extended period, I tried to hook it back up to my system. I upgraded the speaker and my iPhone app, then spent hours trying to get it to find my music library, but no luck. Finally I went to my laptop and upgraded the Mac App there; it immediately found my library, then all I had to do was reboot the iPhone app and now both work. Note if you have multiple networks you have to be on the same network as the speaker, and it appears to only work on a 2.4Gb network.