Hi,
at the End i didnt get it to work via wireless, i have no replaced my R710 near to the Playbase and connected the Playbase to the 2nd LAN Port of the R710, so now all other Sonos Speaker use Sonos Net.
But im not happy with this, it works like a charme to April, and even with the old Unleashed Software i did not get it to run.
Not the best Solution but for me after spending a few hours to get it running, a working one.
Thank you.