PAM to LDAP

[Bob]

I am trying to get our SuSE 9 (s390x) to use the common company LDAP 
server. I have tried several ways to get LDAP users to be able to login. 
Right now the /etc/security/pam_unix2.conf is set to use_ldap and there 
is no sshd in the /etc/pam.d. When a user that is in the local Linux 
system directly can sign in, if the user is not in either the Linux 
machine or LDAP, the system will ask for a password a few times and then 
close the connection.

But if the user is in the LDAP server, once the password is entered the 
ssh will just close. In the /var/log/messages the following line shows 
up: sshd[5162]: fatal: PAM: authentication thread exited unexpectedly

Anyone know how to either get around this or what the right 
configuration is to use LDAP or how to get more information on what is 
wrong.