Hello I have recently bought a Plantronics .Audio 310 PC headset. I cant seem to get the microphone on it working, I plugged it into the microphone jack at the back of the computer where the little microphone picture is but it didnt work. I got the headphone working by plugging it into the jack at the bottom of my screen (BENQ screen which has speakers at the bottom). I havnt been able to get the headphone working by plugging it in to the actual computer, only by plugging it into the screen/speakers. I really need some help into how to get the microphone to work and what I should be plugging it into. I have a Nvidia sound card so it should work..Any help would be greatly appreciated. Thanks Mark.