Hello, I just installed my MB and the 4 USB 3.0 ports on the back are not working. It's an a75m-hvs. I was under the impression that those ports are backwards compatible so. But if I plug in my mouse or keyboard they do not work. I installed all the drivers that came with the cd and I have search on asrock's site for additional drivers with no luck. Everything in the bios looks good too. Any ideas?