I have all my devices set up to use the volume control via my amp which is setup in system properties.

When i select either my Denon CD player or my Denon Bluray player,everything works fine.

But when i select Sky,I keep getting a lot of 'Command Failed' errors,although it will eventually turn the volume up or down.

I can't really understand why there is a problem with Sky,but not the others ?

I am using a RFX 9400 wireless extender,if this has any bearing on the situation.

The extender is set to NETWORK mode.