I plug it in, but nothing happens. No driver installer prompt, nothing. But it comes up in the control panel. I set it as my default device but still nothing. What am i doing wrong? Im using Dt770's. 80Ohm.

ive had the ath m50's for a while now, and im just not feeling them like i thought i would.... i listen to almost anything from electronica to country. but when im listening to my headphones its mostly electronica. so it needs to sound good for that.... i dont have an amp, and would prefer not...