I looked in the manual for an MSI K7T266 Pro2 about hooking up USB. I think the case (purchased separately) has the newer type of connector for USB, where it's all one thing and there's a blank area where no pin can go to prevent improper installation. I don't see a way to hook up the case's USB ports. Anyway, I looked up J12 and JKBV1 in the manual and mine are set to default, so I'm not sure why the on-board USB port in the back aren't working. The manual does mention something about having to turn these features on in the bios, but I'm afraid to touch my bios before asking for help.