I have a new Phillips blu-ray player with analogue 5.1 output now I have a 2.1 setup so the player is connected direct to the aux input on my hi-fi amp and the sub is connect direct via the players sub output I have set up the speakers in the players setting : front speakers large, no centre, no rear and sub on, all volume is set to max, now this is my problem I get all the sound including background speech but no speech sound from the people talking any ideas why ?