if its the headphones, make sure youre pluggin em into the right hole if its the soundcard, make sure you can see it in Device Manager...
plug it into your sound card where you normally plug in the speakers. Sorry, you sound extremely noobish....
Ah, I'm not! The problem was ofcourse not WHERE I should plug the headset LOL! There was another problem with my Audio Card, It's fixed now. Sorry if I did explain bad, as I probably did, lol ^_^