ssh local users could not open session error

[vrdesu-www]

Hi

I have some typical issue while trying to connect to my root or other users from my terminal.

like su -
asking for password and after that it displyed a message like

$su -
Password:
could not open session

I tried connect using ssh then I am getting the following
$ssh root@localhost
Last login: Sun Nov 1 14:13:45 2009 from localhost
Connection to localhost closed.

Background: Before this happended, I was tryied modify sshd_config in /etc/ssh/ folder to allow passwords less than 2 words.

Can any one give solution on this.

[vrdesu-www]

This is resolved.

I made some changes in shadow file. Which caused all these issues.