Dont know how to use an Earpiece for Xbox360 controller, noob here.

Hey there, i had a question about an earpiece.I recently bought an Official "Microsoft® Xbox360™ Wireless Reciever for Windows®" and an "Microsoft® Xbox 360™ Wireless controller"
Now i also got this "Gioteck EX3XB3" earpiece wich seems to be designed for the controller.However when i stick it in the controller, it doesnt work.
Any idea's or awnsers about this? thank you.

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Seems to be working after all, Sorry guys.