When I connect a usb 2.0 device to my system the system recognizes there is something connected but will not assign a letter to device or install it, this is when the bios is set to enable usb 2.0. When I dissable the usb 2.0 and put it back to 1.1 the system recognizes the device and assigns letter and installs device. The usb card and all devices are both 2.0.. Please help totaly confused on what else to do.