Reply to Usb 3.0 express card not working with Audio 2

Hey guys, wondering if you can help me out. I have a Lenovo G450 laptop, and my usb ports are all screwed up. So I just bought a SIIG Usb 3.0 express card, believeing this would solve my problem. But When I plug my Audio 2 into it, it recognizes it, but it doesn't actually work. For instance, when I press play in Traktor, the button lights up, but the audio doesn't actually play. The soundwave doesn't even move... Any ideas on why? Did I just throw away $35?