2 Linksys Network cards in one Computer

[silentkevin]

I am trying to turn an old sony vaio pentium 200 into a router for a cable modem for a friend of mine. He bought 2 linksys 10Base-Ts that came with a linksys home networking kit, plus 2 linksys etherfast 10/100s. When I have only one of the cards in the computer, it works fine, can ping and do anything I want to. When I try to add the other card, everything looks right, but I can't copy files using network neighborhood. On the one that is connected to the cable modem, I can ping the nearest gateway, but can't get any further. If i pull either card out, the one remaining works fine again. I'm thinking that there is a problem with the routing, or perhaps a hardware conflict between the 2 linksys cards. I'm using win98SE, is there any way to assign a specific route for certain IP addresses like there is in linux? Or is there some known incompatibility with using 2 linksys cards in one computer. I tried moving both to another 98SE computer, and the same behavior resulted. I tried switching the cards around, put 2 exactly alike and tried with different ones, but the behavior was the same. I'm gonna try it with a few of my network cards, see if using a different brand helps.

Any help with this would be appreciated.

Thanks,
Kevin