Xbox live halo3 voice comunication??

ok so i have the headset (that comes with xbox360) that includes a microphone. i turn it on, make sure the volume is right up but when i talk in matchmaking, social slayer it doesnt seem that anyone hears me. also what is with the cross on the left of the player? does that mean that they cant talk? i really need help talking to people!! thankz in advance xxx


p.s can u say in steps how 2 communicate if possible

Xbox live halo3 voice comunication??
When talking with other people in the game, you have to press a direction on the D-pad to enable other players to hear you.





Steps:


1) Press a direction on the D-pad


2) Start talking





You don't have hold it down, just press a direction once and keep talking. Once you stop, people won't be able to hear you anymore. Just repeat steps 1,2 to start talking again.
Reply:you have to press any key on the D-pad and it will make a click sound and then you can talk. sometimes it cuts you off so if your saying a lot, you should hold the button down. the speaker insignia means that you have a microphone connected.
Reply:if there are more than 4 players on your team than you have to press up on the d-pad to talk...if there are less you dont have to...
Reply:i had this problem you have to press one of the d -pad buttons then you can talk but then if you stop talking you'll have to press it again sorry i am not sure which one just check hope this helps