referral on openldap v2.07

["Tux" <csyap@starnet.gov.sg>]

I've manged to get referral working on openldap v1.2.11 but when upgraded to
v2.0.7, re-generate new databases, it seems that the referral stopped
working. I performed a search "ldapsearch -x -b "c=sg" cn=*". Pls help.
Thanks.

Below is my configuration:

1. 3 ldap databases on the same machine:

database ldbm
suffix  "o=org1"
rootdn  "cn=rootdn,o=org1"
rootpw  secret
directory /var/lib/ldap/org1

database ldbm
suffix  "o=org2"
rootdn  "cn=rootdn,o=org2"
rootpw  secret
directory /var/lib/ldap/org2

database ldbm
suffix  "c=sg"
rootdn  "cn=rootdn,c=sg"
rootpw  secret
directory /var/lib/ldap/global

2. ldif added to the global database
dn: c=sg
objectclass: country
c: singapore

dn: ref="ldap://localhost/o=org1",c=sg
objectclass: referral
ref: ldap://localhost/o=org1

3. Results returned from ldapsearch:
version: 2

#
# filter: cn=*
# requesting: ALL
#

# search reference
ref: ldap://localhost/o=org1

# search result
search: 2
result: 0 Success

# numResponses: 2
# numReferences: 1


I've also tried the following ldif for global database but without success:
dn: c=sg
objectclass: country
c: singapore

dn: o=org1,c=sg
objectclass: referral
objectclass: extensibleobject
o: org1
ref: ldap://localhost/o=org1/