samba - Dec 2005 - Problems with the list of users in Windows 9x clients

In a server Debian Sarge with Samba 3 PDC user security that spreads to LAN of
15 W9x/2000 clients, weeks ago the user "Rick" (with permissions of
admin) disappeared of the list of users that is seen in the window
"Share" of the Windows 9x clients (NOT in the W2K clients), reason why
"Rick" cannot be added to shared folders on W9x.
I erased and create "Rick" again (on Linux and Samba), with the same
username "Rick" with such permissions and in such groups in which was,
but "Rick" follows without appearing on W9x user list ....The smb.conf
DOES NOT have the line smb passwd file = /etc/samba/smbpasswd... It will be by
that "Rick" does not appear?  But why ONLY this one usuary is not in
the list of the Windows clients (and ONLY in W9x, NOT in W2k clients)?
Some idea???
Regards
Ricardo