questions about BayStack 350T switch

Does anybody here have any experience with a BayStack 350T 16 port 10/100
autosense switch? I picked up a couple at an auction the other day and am
trying to see how they work. I don't know diddly about them, although
somebody told me these things are just about as configurable as you'd ever
want or need.

I've got a Qwest DSL line with a Cisco 675 modem/router that hooks into a
little 8 port hub and five computers plugged into the hub.

When I plugged everything into the 350T, my main computer is the only one
that's able to attach to the outside world. The other machines just say
"Network not responding". I switched the ports a few times, and the same
thing happened, so it's not bad ports.

Maybe it's a 675 setup problem, and maybe it's a 350T setup problem. Can
anyone help?

Thanks
-David Schwartz