OpenLdap Configure Simple Security Authentication

I am new to LDAP and have the following situation:

We have two systems using LDAP. One of the systems uses Solaris and
the other system is on Linux boxes.

We are using SUN One Directory server on the Solaris machines. We are
using simple security and the current username and password are:
cn=directory manager
rootpw= password

We also are installing openldap on our linux machines and we need to
configure it to use the same username and password as the Solaris
machines:

I have tried doing the following in the slapd.conf file:

rootdn "cn=directory manager"
rootpw password

ldif file has "dn: domain=carl.com"

When I start ldap it complains that the rootdn needs to have dn:
domain=carl.com appended to it. I could successfully start ldap with
the suggested update to the username" "cn=directory manager,
domain=carl.com" However, I cannot connect to the server using the
username: "cn=directory manager" which prevents the solaris machines
from connecting to it.

Is there anyway that I can configure openLdap to use "cn=directory
manager" as my username. I am not able to update the Solaris machines
to use a different username.