Guys, thanks for your advices.
Darryl: A tried almost everything, even every USB slot.... I think it's really fried..
For your budget and stuff questions.. I'm only a conservatory student, so I only need to record something to school once in a while. Sometimes I have some idea, so to hear how it sounds, I record more instruments but you know, I'm not a big producer or something so.... I want something good but it doesn't have to be a professional sound card.