Home Networking Problem

I have a small home network that consists of a Netgear FB105 5 port hub, three Win 98 SE PCs and a cable modem. Each of the PCs has a Netgear FA311 NIC installed, and all are talking to the cable modem without any problems. They can all see themselves in Network Neighborhood, but no matter what changes I make to the configurations, I can’t seem to be able get them to see each other. Any help figuring this out would be greatly appreciated.