Hi Guys, I just bought the Logitech Z-5500D and have set it up. The motherboard in the PC is the Gigabyte P35-DQ6 that has on board support of 7.1 channel. The sound system knows that the speakers are setup and when testing them sound will come out. But when I plug the jack in the PC detects that, but not the fact that they are the Rear Speakers. Is there anything that I can look at doing?