Peer to peer network problem

Our office has 10 computers and one network printer on a peer to peer network. Most of the compueters are running Windows 98, some are running Windows 95. Two of the computers recently stopped recognizing each other. They were working fine, then they just stopped recognizing each other. They both recognize all the other computers on the network and both are recognized by all the others on the network. They just won’t work with each other. Both have Windows 98SE installed. We have uninstalled and reinstalled TCP/IP, no help. Any suggestions?