Bought a used Workcentre Pro 55 in good condition. Cannot get my Windows 8 computer to acknowledge it. According to "Port Setup" there is a MAC Addres 00:00:aa.6a:f7:11. The "USB Port Enabled" is disabled. When I plug in USB cable, nothing happens. I cannot find any link to enable them. The lights on the ethernet port on the printer work when connected to computer, but no acknowledgement at the computer. Every attempt to load Xerox driver onto the computer fails. Any suggestions?