LMS not finding any players

[gibbo9000]

Thanks for you inputs guys.

Have gone back to basics and narrowed but not solved the problem.  Here is where I got to:

• Two clean / parallel Pi builds with full raspian update/upgrade and clean Snakeoil installs and upgrade to latest firmware.  Both activated.
  
• One Pi is set up with musiic library and LMS.  LMS appears to work fine and is the only instance on the network.  I put Squeezlite-X on a PC and it found LMS / LMS found it and it appears in mysqueezebox.com.  Following the LMSWeb link from in Snakeoil shows up the Squeezelite-X player.  And music plays on PC.
  
• Other Pi is set up as Music Client only as per image below.  Have tried all versions of Squeezelite (with multiple restarts etc.), and 3 different DACs.  It just does not present on the network as an available player anywhere (LMS web, Squeezelite-X).  Turning off main router firewall didn't help either. 
  

Same situation if I add the cCient to the Pi with LMS on it - it can't find it.  Probably irrelevant to this - but MPD setup with this DAC does work on single Pi. 

So it feels like it is certainly at the player end.  Have I missed something obvious ?

Will dig further over the weekend.  Good news is I have a good clean Pi install methodology that is now well proven!

Gibbo