changing local password for root failed

[DvG]

Hi,

 when im trying to change password console with passwd , it tells 
 that :  changing local password for root
           passwd: pam_chauthtok(): error in service module

the same with other users. Where could be the problem ? 

 

/etc/pam.d/login
# auth
#auth           sufficient      pam_skey.so
auth            requisite       pam_cleartext_pass_ok.so
#auth           sufficient      pam_kerberosIV.so               try_first_pass
auth            required        pam_unix.so                     try_first_pass
# account
account         required        pam_unix.so
# session
session         required        pam_permit.so
# password
password        required        pam_permit.so

/etc/pam.d/passwd
password        required        pam_unix.so             no_warn try_first_pass nullok
/etc/pam.d/su
auth            sufficient      pam_rootok.so           no_warn
auth            sufficient      pam_self.so                 no_warn
auth            requisite       pam_group.so            no_warn group=wheel root_only fail_safe
auth            include         system
# account
account         include         system

 

# session

session         include         system