WOW!
Do you have the Win98 clients configured properly with correct IP addresses and subnet masks for your network? If not, assign the client machines with the proper IP and subnet mask addresses. Can the Win98 clients ping any other machine on thenetwork? This is also related to wrong IP address and subnet mask. Are you using DHCP on the network? If so, the client computers need to be setup to get addresses assigned to them. The questions I ask above are related to how the TCP/IP protocol issetup in the network section in the control panel on the client computers. Is the Win2000 server the DHCP server? The Win2000 server must be the DHCP server on your doamin if you are going to use DHCP properly.
E-mail me for more detailed instructions. Sorry if my answers are too vague. Not enough room for that.
Unixmandt