I can not access the shared folder /documents/fit

[Alexandre Monteiro]

Commands to add the User tux:

adduser tux
smbpasswd -a tux

File smb.conf:

[global]
        workgroup = FT
        server string = Samba Server Version %v
        netbios name = TUTU
        log file = /var/log/samba/log.%m
        max log size = 50
        security = user
        passdb backend = tdbsam
        log level = 1 auth:3

[FIT]
        comment = FIT
        path = /documentos/fit/
        browseable = yes
        writeable = yes
        valid users = tux

[tux at TUTU documents]$ pwd
/documents

[tux at TUTU documents]$ ls -l
drwxrwxrwx  2 tux  tux      4096 Sep  9 11:05 fit

[tux at TUTU documents]$ pdbedit -Lw
tux:512:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:5BD8BAA07E57C399D49C82D6DB500E72:[U
         ]:LCT-522F82E2:

I can not access the folder. Follows the log samba (/var/log/samba/):

[2013/09/11 11:51:22.343382,  1] smbd/service.c:678(make_connection_snum)
  create_connection_server_info failed: NT_STATUS_ACCESS_DENIED

What can I do now?
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