Me and a buddy are having problems hearing each other talk, at times we can hear each other but at time we cant. For example, the last time we tried this he could hear me but the only thing I heard was static when he said something. The problem is just between me and him, I can talk and understand everything everyone else says other than him. The problem cant be in our headsets because we are each using brand new ones. In addition, we cannot accept each others party invites on call of duty. HELP?