Spotify Plug in: no sound coming


I just installed the Spotify plugin. It is active and I am able to see the stations, etc. However, when I play, I hear no sound. The song plays but no sound comes out. My own library is working fine.

I tried to uninstall and re-install the plug in again. But now, it does not show up in the Browse/Home page. Not sure what is going on. I only have a “Free” Spotify Account. Could that be causing it?