V 1.4 No sound using WebUI or UPnP

I have installed Volumio 1.4 on a PI model B. Music files are on a USB HD which is mounted in /media/music. After running the updateDB, I can see all my music in the WebUI. But, when I click on a song, the clock shows that something is happening but no sound. I am accessing Volumio from a desktop LINUX machine with firefox over ethernet. The PI was prepared by simply dd of the downloaded image to an SD card

I have also enabled UPnP and tried to access using a Grace Digital receiver connecting to my stereo (plays Pandora perfectly). The device shows volumio but when I click through its menus, there are no albums present.

Any thoughts on this?