Problem mounting a SMB directory

[Salvador Santander Gutiérrez]

We're trying to mount a windows shared directory.When we've used the
smbclient command all goes well:

[root at alcala root]# /usr/bin/smbclient -U DOMAIN/user \\\\CORIA\\Directory
Password:
smb: \> dir
  .                                   D        0  Mon Oct 17 12:36:51 2005
  ..                                  D        0  Mon Oct 17 12:36:51 2005
  backup 20051409                     D        0  Wed Sep 14 14:54:41 2005
  traspaso_alquiler                   D        0  Fri Sep  2 11:26:49 2005
  traspaso_alquileres                 D        0  Wed Oct  5 08:19:05 2005
  traspaso_dipp                       D        0  Fri Sep  2 11:22:27 2005
  traspaso_economico                  D        0  Fri Sep  2 11:24:00 2005
  traspaso_informes                   D        0  Fri Sep  2 11:25:55 2005
  traspaso_prinex                     D        0  Thu Nov  3 08:29:42 2005
  traspaso_spr                        D        0  Tue Oct 11 13:03:37 2005
  traspaso_verif_contr                D        0  Tue Sep 27 18:33:36 2005

                42975 blocks of size 16777216. 30922 blocks available


The problem happens when we try to mount the same directory:

[root at alcala root]# smbmount \\\\CORIA\\Directory /mnt/traspasos_prinex -o
username=DOMAIN/user
Password:
25646: session setup failed: ERRDOS - ERRnoaccess (Access denied.)
SMB connection failed


The user has read, modify access to this directory and the server is a
windows 2000 server.
¿Any ideas to solve this? Thanks in advance.