Follow the steps below:-
Start>All programs>Asus Xonar Dg Audio>Asus Xonar DG Audio Center. Then in the auidio center click the "Main" tab, and changed Analog out from 2 speakers to Headphones. Then click on the "Mixer" tab and click the little microphone looking thing next to the slide labeled "Mic". Inside that microphone tab, change "Front Microphone" to "Microphone".
Hope this helps people, this will help for people with the same sound card, or if anyone has an audio center.