I have set up a 4 computer network, each connecting to a 16 port switch. The DC is connected into port 1. When you connect either computer to the switch, the computer says 'Connected at 10Mb/s'. However, neither one of the computers can detect the other, or the DC. I know its set up right, because it all worked fine untill i moved the systems about, and connected it all back up, pleas help.