Problem in the Microphone of headset ?

Hi, I have just bought a new headphone which is not giving me any problem and I like it. But from some time the microphone in it is not working properly. I plug both jack the headphone jack as well as microphone jack in my system but it's still not working.

May be your wire has been jammed from middle that's y it's giving you problem.... you can check this problem by trying someone's headphone which is same as ur.