I'm sorry for the big block of text that I have written but It's a short as it can be to describe my problem.
Quite a while a go I bought some Turtle beach's, more specifically I bought a pair of X11. These were great when both Game and Chat boost worked, after a while of using them I noticed that Chat didn't seem to work, I changed the voice options where it comes from TV to Headset to just speakers back and fourth to see if that would have any affect. But sadly it did not. I noticed that as soon as my chat boost stopped working, the microphone icon that is next to you name while in an xbox live party was always next to my name, regardless of if my microphone was plugged in or not, I assumed that this is just a coincidence and probably just something faulty with my X11's. I had read up on it at the time and I was told it was probably something wrong with the controller and/or Xbox. A little while later I bought a new xbox (Not because I wanted to get my headset fixed, but because my Xbox disk tray had stop working and I had tried to get it fixed but sadly, it wouldn't) and so I also got a new controller, the mic was still there and my chat boost didn't work, so I assumed it was definitely the turtle beach which was wrong. I bought a pair of X12's as one of my ear pieces on my X11 fell off... unfortunately the mic is still there and the chat boost doesn't work on my X12, these are a brand new pair so I have no clue what is going on (Also from the period of switching from X11 - X12, I had a standard microphone that comes with the xbox, which also didn't work but I didn't think this had anything to do with the whole chat boost not working but i'll just throw it in here anyway) So any advice would be greatly appreciated as I have had to play my friends voices through the game boost, which means I have to lower the game volume significantly. Which kind of ruins the experience of the game if I can't hear much of whats going on in the game. Thanks for taking the time to read this.