Windows 2003 server sharing in a workgroup

I have a small home network. I have added a server running Windows 2003 server strictly as a file server. I am attempting to share a drive with other workstations on the network. They are running WInXP Pro. I have went through all the steps of setting up a share, and setting permissions. The other workstations see the server on the network, but do not see the share under it. On a different server running Win2000 server, and the same workstations see a share directory on it just file. What am I missing?