Hello guys

My office has a 3COM Super Stack II routa with 7 computers plugged into it via a workgroup setup. All computers work no problem and see each other no problem.

When I plug our new BT Business Hub broad band into the routa all 7 computer can then work on the internet but cant see each other.

The BT Business Hub has 3 ports in the back and if I plug three of the computers into they all see each other and work on the internet no problem, obviously I need to plug all 7 computers in though so what is my best bet?

Kind regards
James