No sound using optical cable

I connected mt wd-live directly to my tv with a hdmi cable. Than i connected the wd-liveplayer with a optical cable to my home cinema system (JVC). But: nou sound comes out off my home cinemasystem. Can anybody help me?

In WD TV Live select ‘Digital’ in audio option. Is your JVC ccapable of decoding Dolby / DTS & handle PCM ?

Yes i selected digital mode allready. In my jvc i selected aux-digital. Nothing is working. I just can enjoy sound in my jvc when i connect with analog cable.

Possible faulty unit or cable.

What JVC model do you have. Is there some setting in the JVC which needs to be set to accept teh optical input. I only say that because with my Sony different input settings accept sound input from different sources.