Need Help on overlay chain.

["Sandeep A.S" <sandeep@netcontinuum.com>]

Need help on overlay chain entries:

My 1st server tree is like this

      rootdn:    dc=nc,dc=com
                     |
                    dc=us,dc=nc,dc=com
                     |
                     dc=in,dc=nc,dc=com
                      referral
                      ref: ldap://ip address of  second server:port
on second server:
         
       rootdn: dc=in,dc=nc,dc=com
                   |
                   ou=People,dc=in,dc=nc,dc=com 

In the client systems are configured  with  basedn: dc=nc,dc=com. My 
requirement is to authenticate users on the second server
to the first server client systems  .
I  tried the followng slapd.conf in the server ; but not working
<snip>
overlay         chain
chain-uri       "ip address of  second server:port"
chain-rebind-as-user    TRUE
chain-idassert-bind     bindmethod=simple
                       binddn="cn=Sysadmin,dc=in,dc=nc,dc=com"
                       credentials=secret
                       mode=self
database  ldap
suffix    ""
lastmod off
uri "ldap://ip address of  second server:port"
binddn        "cn=Sysadmin,dc=in,dc=nc,dc=com"
bindpw        secret.
rebind-as-user
Mainly  I am confused of the location of the chain overlay entries
whether it need to be in global section or  in the database section or 
in the backend ldap database section ?
binddn  is the rootdn of the second server.
Thanks
Sandeep