[Samba] Problems with access to shared directory

[intel Man]

I have configured a drive letter to a shared directory:  g:\vfp6 valid user: 
  ingenieria

When I want to enter to another directory:  \ \ server\fs user:    admin

This it doesn't allow me to enter requesting me repeatedly the user and the 
password.

Reproducing the problem:

- Entering to the drive g:
- Entering to the other directory: \ \ server\fs with the user: admin
- Refused access


- Not to ENTER to the drive g:
- Entering to the other directory: \ \ server\fs with the user: admin
- Access ok



Server:   samba 3.0.23c
Client Windows 2000 is ok
Client WIndows XP is error

----------smb.conf---------------
[global]
	workgroup = USI
	netbios name = COPISERVICE
	server string = Servidor Samba %v
	smb passwd file = /etc/samba/smbpasswd
	log level = 0
	log file = /var/log/samba/%m.log
	max log size = 20
	smb ports = 139
	max xmit = 65535
	socket options = TCP_NODELAY SO_SNDBUF=65536 SO_RCVBUF=65536 IPTOS_LOWDELAY
	dns proxy = No
	kernel oplocks = No
	lock spin count = 100
	lock spin time = 30
	ldap ssl = no
	admin users = admin
	oplocks = No
	level2 oplocks = No
	strict locking = No

[homes]
	comment = Home Directories
	valid users = %S
	read only = No
	create mask = 0664
	directory mask = 0775
	browseable = No

[vfp6]
	path = /usr/fs/vfp6
	valid users = @general
	read only = No

[fs]
	path = /usr/fs
	valid users = admin
	read only = No




---------Log-----------
[2006/09/05 11:07:52, 10] smbd/share_access.c:user_ok_token(208)
  User ingenieria not in 'valid users'
[2006/09/05 11:07:52, 2] smbd/service.c:make_connection_snum(571)
  user 'ingenieria' (from session setup) not permitted to access this share 
(fs)
[2006/09/05 11:07:52, 3] smbd/error.c:error_packet(146)


Here I attempt login like user admin and show user ingenieria?

Is bug in samba or is normal?

Thanx

Luis Rivera
Lima-Peru