When you installed the Connect in the S2 environment did you also set up the music library too? As the S1 and S2 systems are independent of each other the S2 system won’t know where to find your library. 

Hi thanks for answering. I didn’t try to set up the library either in S1 or S2 mode. In S1 i’ve add tune in, allow upnp/dlna. The only annoying thing with s1 was that i was unable to play an entire folder of music(No button to play all or add the folder to the playlist). When I’ve upgraded to S2 and install the app, i couldn’t see my media server and did not find the option to allow upnp/dlna. I didn’t find the way to play the files stored on my android device too, it was fine in S1. The biggest problem is that i cannot go on with s2 mode neither, the app don’t allow me to add the connect . I just want to reverse to S1.

So I’ve been able to downgrade by using another phone. I’ve installed Sonos apk on it, I have started the downgrade process and after 4 minutes, i had an error message saying that the downgrade process failed. Although this error message, I tried to reinstall with the S1 apk and it worked. I still have the message to ask me to go for S2, AH AH not for me.

Why are you using apks? Use the apps directly from the Play Store (“Sonos” or “Sonos S1”).

sorry for the misunterstanding, by apk i mean app. For me there is no difference between both name. I’ve downloaded everything from the google play store.