User unlock problem in Tru64 4.0F Server

Hi Friends

We have two node trucluster Tru64 4.0F Alpha Servers,In one of Tru64 4.0F Unix Server I am unable to unlock users, when I issue usermod command I will get following error

/usr/sbin/usermod -x administrative_lock_applied=0 username
account manager has exited unexpectedly - please file a problem report
Resources lost(coredump)

I am also unable to open Account Manager in Xmanager I am getting the same error message as usermod command.

When I view my /etc/passwd file it's showing some garbage values, I have also rebooted my server but the problem remains same.