My headphone jack that is how

Users questions: Next you have a question why do I plug the headset voice alone can speak to how I sound and voice are unable to speak on the difference? And I plug in the computer sound output to the lower right leg has prompted me to unplug my sound output to the removal, said he was prompted to insert the plug into ~ ~! ~ * I think it is The insertion and removal of why they get an error with the plug in the 2 voice does not take because if I plug in the sound output plug tips are pulled out his headphones not connected to that voice, of course not working Can anyone tell What is the problem under what headphones computer sound card problem or what the problem is how should To change (my headset is plugged into the chassis behind the front of the jack plug socket has no problem being too do not know because there is no plug)
Experts answer: set the problem, open the control panel, sound settings that the program, you can close the front of the detection screen.width * 0.35) thi s.width=screen.width*0.40 *
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