hi... whenever i go and play any type of live on halo 3 i can only talk to my friends. but if im in a lobby with other people i cant talk to them. and beside their name their will be a circle with a line through it..and then when i go to their name and click on it and try to unmute them it says : you have muted this player in the xbox guide. view the gamer card for this player to change this setting. : is that for this player or for me? and when i go their card it will say mute then i click and unmute and then still nothing.. plz help..