networking Win 95 clients w/ Win 2k clie

I have a Win 2k pro pc networked thoug ha DSL router to two Win 98 pc’s and using file and print sharing and DHCP throuh the router and everthing works fine. I moved the Win 2K pc into an office with 2 Win 95 PC’s and they cannot communicate. They all belong to the same workgroup. They are all announced on the hub. I cannot ping any of the pc’s from one another. The 2 win 95 Pc’s do not have IP addresses and the Win 2k gives one to itself after not finding a DHCP server. ANY answers? I tried assigning an IP oone address diferent from the Win 2k and still nothing. I Figure that if I connect all to a DHCP router , I will gain connectivity…REAL world.