[Samba] Samba - not able to change passwd

[Vijay Kumar]

Hello,

We have a samba domain and now some of the users are unable to change their password, below is the error : 

pdb_free_sam: SAM_ACCOUNT was NULL
[2004/06/07 13:52:29, 0] smbd/chgpasswd.c:check_oem_password(817)
  check_oem_password: incorrect password length (-135857651).
[2004/06/07 13:52:29, 0] passdb/passdb.c:pdb_free_sam(210)
  pdb_free_sam: SAM_ACCOUNT was NULL
[2004/06/07 13:52:29, 0] smbd/chgpasswd.c:check_oem_password(817)
  check_oem_password: incorrect password length (-135857651).
[2004/06/07 13:52:32, 0] passdb/passdb.c:pdb_free_sam(210)
  pdb_free_sam: SAM_ACCOUNT was NULL
[2004/06/07 13:52:32, 0] smbd/chgpasswd.c:check_oem_password(817)
  check_oem_password: incorrect password length (-135857651).
[2004/06/07 13:52:32, 0] passdb/passdb.c:pdb_free_sam(210)
  pdb_free_sam: SAM_ACCOUNT was NULL
[2004/06/07 13:52:32, 0] smbd/chgpasswd.c:check_oem_password(817)
  check_oem_password: incorrect password length (-135857651).

I also havea smbpasswd file in /etc/samba directory 
http://lists.samba.org/archive/samba/2002-November/055022.html

Redhat - Kernel version is 2.4-18.3 

Can someone point me to some solution please ? 

Regards,
Vijay Kumar.