LDAP Linux user authentication problem

[Arturo Peris <aperis@gap.upv.es>]

Hi ¡ I'm trying to set my ldap server as a centralized users'
authenticator in my linux cluster.
I have all working fine, but last when I delete some user from my
/etc/passwd, /etc/shadow and /etc/group files I can't see calls in logs
to my ldap libraries. If I don't delete users from files I can see calls
to ldap libraries and user can log into the system, althougth these
users log into the system through the /etc/password file.

My /etc/nsswitch.conf file:
passwd: ldap files
#shadow: files ldap
group:  ldap files


Ldapsearch works fine:
[root@machine01 openldap]# ldapsearch
SASL/DIGEST-MD5 authentication started
Please enter your password:

I have used padl migration scripts.

My ldap rmp packages:
openldap-clients-2.0.11-8
openldap-2.0.11-8
nss_ldap-149-4
auth_ldap-1.4.7-2

My pam rpm packages:
pam_krb5-1.31-1
pam-0.74-22
pam-devel-0.74-22

ne1 can help me ?
Thanks.