samba - Mar 2004 - Share access from xp to 98 samba PDC??

Hi
  i have a SaMBa server acting as a PDC, replacing a win2000, everithing
is working fine but just a small problem, in the network there are some
winXP, and  when they try to access a win 98 share this happens.

1.- it asks for a username and password (the machine name and paswword for
the domain dont work).

2.- if use another domain acount it work but that sucks cause i will be
using diferent usernames and passwords for every machine

in the win98 the shared directory is configured with share level access
control

if i turn off samba and use the Winbugs 2000 it works well, but i would
hate to use WinBUGS, i dont know if its something about samba but i will
apreciate any help.


Thanks