no audio in viewer - FCP7 multi clip
 

I've just gone back to a project I left a few months ago. It worked fine at that time so I'm sure I've solved this before and just forgtton how to use multiclip or exactly how I set it up.
The problem: I'm unable to hear any audio when I am in the viewer and the multclip window is playing.
Its a concert and the only audio I have at all in the timeline is from Camera 1 ( of 6).
This is probably very basic.
Audio plays fine in the canvas but then I am only seeing one camera at a time

BTW - I only see the Blue outline around my clips, no Green. Isn't green supposed to indicate which clip is playing the audio?