[Samba] Problems with the list of users in Windows 9x clients

[Ricardo Chamorro]

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