sound for netflix

Hello all

In looking at the posts I am afraid I feel my query may be somewhat trivial but here goes.

I have just purchased a Naim Mu-So. At the same time I purchased a new Panasonic Viera LCD TV. the Mu-So appears to be working ok for the TV normal channels and radio as well as streaming from phone and ipod , spotify etc. However when I have Netflix on I cant get any sound through the Mu-So and have to rely on the TV speakers. I think I may not have set things up ok but cant track down where i have made an error.  I have an ethernet signal booster from plug to TV. but have not connected anything from the Mu-So ethernet port . Thank you for taking the time to consider. Many thanks. Surreybee