Erro estranho no samba, ninguem acessa nada!

Opa, blz?
O samba aqui onde eu trabalho funcionava perfeitamente...
De repente começou a dar acesso negado para todos os usuarios em todos os arquivos.
Se eu logo pelo linux tenho acesso normalmente (leitura e escrita, execucao nao posso testar).
O estranho é o seguinte, mesmo as permissoes dos usuarios setadas corretamente, eles nao conseguem ler nenhum arquivo.
Se eu logado no linux, pego o arquivo edito ele no vi e salvo ele, os usuarios conseguem ser ele, mas nao conseguem executá-lo

Em anexo segue o nosso smb.conf
Código :
[global]
 
# workgroup = NT-Domain-Name or Workgroup-Name
   workgroup = BIFERCO
 
# server string is the equivalent of the NT Description field
   server string = Samba Server %v
 
# This option is important for security. It allows you to restrict
# connections to machines which are on your local network. The
# following example restricts access to two C class networks and
# the "loopback" interface. For more examples of the syntax see
# the smb.conf man page
;   hosts allow = 192.168.1. 192.168.2. 127.
 
# if you want to automatically load your printer list rather
# than setting them up individually then you'll need this
   printcap name = /etc/printcap
   load printers = yes
 
# It should not be necessary to spell out the print system type unless
# yours is non-standard. Currently supported print systems include:
# bsd, sysv, plp, lprng, aix, hpux, qnx, cups
   printing = cups
 
# Uncomment this if you want a guest account, you must add this to /etc/passwd
# otherwise the user "nobody" is used
;  guest account = pcguest
 
# this tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/%m.log
 
# Put a capping on the size of the log files (in Kb).
   max log size = 0
 
# Security mode. Most people will want user level security. See
# security_level.txt for details.
   security = user
 
# Use password server option only with security = server
# The argument list may include:
#   password server = My_PDC_Name [My_BDC_Name] [My_Next_BDC_Name]
# or to auto-locate the domain controller/s
#   password server = *
;   password server = <NT-Server-Name>
 
# Password Level allows matching of _n_ characters of the password for
# all combinations of upper and lower case.
;  password level = 8
;  username level = 8
 
# You may wish to use password encryption. Please read
# ENCRYPTION.txt, Win95.txt and WinNT.txt in the Samba documentation.
# Do not enable this option unless you have read those documents
   encrypt passwords = yes
   smb passwd file = /etc/samba/smbpasswd
 
# The following is needed to keep smbclient from spouting spurious errors
# when Samba is built with support for SSL.
;   ssl CA certFile = /usr/share/ssl/certs/ca-bundle.crt
 
# The following are needed to allow password changing from Windows to
# update the Linux system password also.
# NOTE: Use these with 'encrypt passwords' and 'smb passwd file' above.
# NOTE2: You do NOT need these to allow workstations to change only
#        the encrypted SMB passwords. They allow the Unix password
#        to be kept in sync with the SMB password.
   unix password sync = Yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *New*password* %n\n *Retype*new*password* %n\n *passwd:*all*authentication*tokens*updated*successfully*
 
# You can use PAM's password change control flag for Samba. If
# enabled, then PAM will be used for password changes when requested
# by an SMB client instead of the program listed in passwd program.
# It should be possible to enable this without changing your passwd
# chat parameter for most setups.
 
   pam password change = yes
 
# Unix users can map to different SMB User names
;  username map = /etc/samba/smbusers
 
# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /etc/samba/smb.conf.%m
 
# This parameter will control whether or not Samba should obey PAM's
# account and session management directives. The default behavior is
# to use PAM for clear text authentication only and to ignore any
# account or session management. Note that Samba always ignores PAM
# for authentication in the case of encrypt passwords = yes
 
  obey pam restrictions = yes
 
# Most people will find that this option gives better performance.
# See speed.txt and the manual pages for details
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
 
# Configure Samba to use multiple interfaces
# If you have multiple network interfaces then you must list them
# here. See the man page for details.
;   interfaces = 192.168.12.2/24 192.168.13.2/24 
 
# Configure remote browse list synchronisation here
#  request announcement to, or browse list sync from:
#	a specific host or from / to a whole subnet (see below)
;   remote browse sync = 192.168.3.25 192.168.5.255
# Cause this host to announce itself to local subnets here
;   remote announce = 192.168.1.255 192.168.2.44
 
# Browser Control Options:
# set local master to no if you don't want Samba to become a master
# browser on your network. Otherwise the normal election rules apply
;   local master = no
 
# OS Level determines the precedence of this server in master browser
# elections. The default value should be reasonable
;   os level = 33
 
# Domain Master specifies Samba to be the Domain Master Browser. This
# allows Samba to collate browse lists between subnets. Don't use this
# if you already have a Windows NT domain controller doing this job
   domain master = yes 
 
# Preferred Master causes Samba to force a local browser election on startup
# and gives it a slightly higher chance of winning the election
   preferred master = yes
 
# Enable this if you want Samba to be a domain logon server for 
# Windows95 workstations. 
   domain logons = yes
 
# if you enable domain logons then you may want a per-machine or
# per user logon script
# run a specific logon batch file per workstation (machine)
   logon script = biferco.bat
# run a specific logon batch file per username
;   logon script = %U.bat
 
# Where to store roving profiles (only for Win95 and WinNT)
#        %L substitutes for this servers netbios name, %U is username
#        You must uncomment the [Profiles] share below
;   logon path = \\%L\Profiles\%U
 
# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable it's WINS Server
;   wins support = yes
 
# WINS Server - Tells the NMBD components of Samba to be a WINS Client
#	Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = w.x.y.z
 
# WINS Proxy - Tells Samba to answer name resolution queries on
# behalf of a non WINS capable client, for this to work there must be
# at least one	WINS Server on the network. The default is NO.
;   wins proxy = yes
 
# DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names
# via DNS nslookups. The built-in default for versions 1.9.17 is yes,
# this has been changed in version 1.9.18 to no.
   dns proxy = no 
 
# Case Preservation can be handy - system default is _no_
# NOTE: These can be set on a per share basis
;  preserve case = no
;  short preserve case = no
# Default case is normally upper case for all DOS files
;  default case = lower
# Be very careful with case sensitivity - it can break things!
;  case sensitive = no
 
#============================ Share Definitions ==============================
#[homes]
#   comment = Home Directories
#   browseable = no
#   writable = yes
#   valid users = %S
#   create mode = 0664
#   directory mode = 0775
# If you want users samba doesn't recognize to be mapped to a guest user
; map to guest = bad user
 
 
# Un-comment the following and create the netlogon directory for Domain Logons
 [netlogon]
   comment = Network Logon Service
#  path = /usr/local/samba/lib/netlogon
   path = /home/netlogon
   guest ok = yes
   writable = no
   share modes = yes
 
# Un-comment the following to provide a specific roving profile share
# the default is to use the user's home directory
;[Profiles]
;    path = /usr/local/samba/profiles
;    browseable = no
;    guest ok = yes
 
 
# NOTE: If you have a BSD-style print system there is no need to 
# specifically define each individual printer
[printers]
   comment = All Printers
   path = /var/spool/samba
   browseable = no
# Set public = yes to allow user 'guest account' to print
   guest ok = no
   writable = no
   printable = yes
 
# This one is useful for people to share files
;[tmp]
;   comment = Temporary file space
;   path = /tmp
;   read only = no
;   public = yes
 
# A publicly accessible directory, but read only, except for people in
# the "staff" group
;[public]
;   comment = Public Stuff
;   path = /home/samba
;   public = yes
;   writable = yes
;   printable = no
;   write list = @staff
 
# Other examples. 
#
# A private printer, usable only by fred. Spool data will be placed in fred's
# home directory. Note that fred must have write access to the spool directory,
# wherever it is.
;[fredsprn]
;   comment = Fred's Printer
;   valid users = fred
;   path = /home/fred
;   printer = freds_printer
;   public = no
;   writable = no
;   printable = yes
 
# A private directory, usable only by fred. Note that fred requires write
# access to the directory.
;[fredsdir]
;   comment = Fred's Service
;   path = /usr/somewhere/private
;   valid users = fred
;   public = no
;   writable = yes
;   printable = no
 
# a service which has a different directory for each machine that connects
# this allows you to tailor configurations to incoming machines. You could
# also use the %U option to tailor it by user name.
# The %m gets replaced with the machine name that is connecting.
;[pchome]
;  comment = PC Directories
;  path = /usr/local/pc/%m
;  public = no
;  writable = yes
 
# A publicly accessible directory, read/write to all users. Note that all files
# created in the directory by users will be owned by the default user, so
# any user with access can delete any other user's files. Obviously this
# directory must be writable by the default user. Another user could of course
# be specified, in which case all files would be owned by that user instead.
;[public]
;   path = /usr/somewhere/else/public
;   public = yes
;   only guest = yes
;   writable = yes
;   printable = no
 
# The following two entries demonstrate how to share a directory so that two
# users can place files there that will be owned by the specific users. In this
# setup, the directory should be writable by both users and should have the
# sticky bit set on it to prevent abuse. Obviously this could be extended to
# as many users as required.
;[myshare]
;   comment = Mary's and Fred's stuff
;   path = /usr/somewhere/shared
;   valid users = mary fred
;   public = no
;   writable = yes
;   printable = no
;   create mask = 0765
 
[orionasp]
	comment = MegaERP
	path = /orionasp
	valid users = @biferco,@admin
	public = no
	writable = yes
	printable = no
	create mask = 0770
	directory mask = 0770
 
[teste]
        comment = MegaERP
        path = /orionasp/orion_teste
	valid users = @biferco,@admin
        public = no
        writable = yes
        printable = no
        create mask = 0770
        directory mask = 0770
 
[dataflex]
	comment = Sistema Dataflex - Biferco
	path = /dataflex
	valid users = @biferco,@admin
	public = no
	writable = yes
	printable = no
	create mask = 2770
	directory mask = 2770
       # umask = 555
 
[usuarios]
	comment = Pasta de Usuarios
	path = /home
	valid users = @biferco,@admin,carlos
	public = no
	writable = yes
	printable = no
	create mask = 0770
	directory mask = 0770
[backup]
        comment = Backup da Base de Dados - MegaERP
        path = /backup
        valid users = fernando,orionasp
        public = no
        writable = yes
        printable = no
        create mask = 0770
        directory mask = 0770
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