Networking Woes

[oreo]

Two computers using Gigabit networking
(one is onboard Asus P4PE, and the other is a 3COM PCI-(X) SERVER NIC)

They are connected via a crossover cable (not cat6, but a sturdy cat5 (new). (I realise i wouldn't get max performance, but i thought i would be able to use it.)

They could see eachother right at the start but very shortly after starting to push some data over the network they stopped being able to see eachother.

They see the network connected, and registering at 1.0Gb but they don't see eachother.

I tried swapping the the PCI the 3COM pci nic was in, but that didn't do anything.

Help.

Also, on the PCI NIC i ran a diagnostic program that came with it, it passes everything except... "Loopback - MAC" and Loopback - PHY" giving the error "unable to load the intermediate ..."