Win 98 under Windows Server 2003

I try to set up a server 2003 based network, My XP and
Y2k workstation are working fine but the '98 station log
on in the network, see the server but the server ask me a
user name and password to connect. After this operation
the 98 station failed to reconnect server. The 98 station
can see the others XP or Y2K staton but not the 98
station. Please help.. Thank you!


Manu