Re: 360 audio surround problem

Connected  BluRay to TV via HDMI ARC !  , 360 box to TV (no ARC) . BluRay surround sound works fine when 360 box unplugged , plug it back in and surround sound goes to mute mode. tried using Virgin remote , no difference so switched that off and went back to the Sony remote , No difference . Tried moving the 360 box away from BluRay but no difference. As if 360 is sending a signal to BluRay to go to mute mode. Anyone got a phone number to talk to a Tech Guy ??? Was on VMedia site for 3 hours yesterday , Totally Useless !!!