No Sound on OpenELEC Eden

I booted to Linux with Eden on a USB flash drive, but I'm not getting any sounds now. Even clicking through the menus are silent. My Apple TV is connected via HDMI to the internal speakers in my Panasonic TV. I went into XBMC settings and changed audio output to HDMI. In fact, I tried all three settings while playing a movie just to be sure, but all were silent. The volume level indicator in XBMC shows full volume. The sound works fine when I boot the native Apple TV os 2.3. Thanks in advance for any help.

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BTW, I also made sure that my TV wasn't muted. I cranked the volume all the way up to 100%. Nothing...