samba - Jan 2006 - could not fetch account password for domain

Hi all

I have samba 3.0.21 with LDAP, using as PDC, and another Linux system which
is domain member server for the PDC
but suddenly Member server is not accessible
from member server, i can ping the PDC ,

in messages logs " could not fetch trust account password for domain "
msdpl.com"

i am not sure , what caused the problem,
i changed the root password on PDC with smbldap-passwd root, can it be a
problem

the nsswitch.conf and ldap.conf also is also  intact, pointing correct dc,


Regards
Niranjan