samba - Feb 2005 - Samba unable to change password :smbpasswd

Hi , 

I am getting following error while changinf the password. 

[ux18750](sapara)home/sapara$/usr/local/samba/bin/smbpasswd
load_unicode_map: filename
/usr/local/samba/lib/codepages/unicode_map.850 does not exist.
load_unicode_map: filename
/usr/local/samba/lib/codepages/unicode_map.ISO8859-1 does not exist.
Old SMB password:
New SMB password:
Retype new SMB password:
machine 127.0.0.1 rejected the session setup. Error was :
NT_STATUS_LOGON_FAILURE.
Failed to change password for sapara


Can any one please advise me what could be wrong and how I can rectify
this error. 

Regards, 
Sanjeev.