I suddenly started having a problem two nights ago when joining a Xbox live party with my friends. I can hear game sound and them talking in the party but they can not hear anything that I am saying. Was working fine for the past 2 years and never had a problem before. I tested my network connections and everything came back fine (NAT is open also). I am using Turtle Beach XP 500 headphones and people can hear me when making calls with the Bluetooth function so I know it is not the mic on the headphones. I am unable to connect to the party when I select certain friends but no problem when trying with other people. I have done everything that I know how. Please someone help...not being able to chat during FIFA and COD2 are killing me.