Starting OpenLDAP: slapd - failed: Unrecognized database type (bdb)..Help required!

[Shamika Joshi <shamika.joshi@gmail.com>]

I'm a beginner with Openldap & trying to bring up LDAP server on UbuntuServer with Berkleys db-4.8.26 installed gives following error on starting the slapd service. Previously I have done sucessful configuration on RHEL & Fedora but for some reason it is not working for me on Ubuntu server.
Could someone throw some light on this? Am I missing something?


shamika@ns1:/etc/ldap$ sudo /etc/init.d/slapd start
Starting OpenLDAP: slapd - failed:
Unrecognized database type (bdb)

shamika@ns1:~$ uname -msrnv
Linux ns1.cmsqalab.com 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 2009 x86_64

Snapshot from /var/log/syslog 

Mar 29 19:41:47 x6u slapd[17730]: @(#) $OpenLDAP: slapd 2.4.18 (Sep  8 2009 17:47:22) $#012#011buildd@crested:/build/buildd/openldap-2.4.18/debian/build/servers/slapd
Mar 29 19:41:49 x6u slapd[17730]: /etc/ldap/slapd.conf: line 88: <database> failed init (bdb)
Mar 29 19:41:49 x6u slapd[17730]: slapd stopped.
Mar 29 19:41:49 x6u slapd[17730]: connections_destroy: nothing to destroy.


Here is my slapd.conf

#
# See slapd.conf(5) for details on configuration options.
# This file should NOT be world readable.
#
include         /etc/ldap/schema/core.schema
include         /etc/ldap/schema/cosine.schema
include         /etc/ldap/schema/inetorgperson.schema
include         /etc/ldap/schema/nis.schema
#include         /etc/ldap/schema/dnszone.schema

# Allow LDAPv2 client connections.  This is NOT the default.
allow bind_v2

# Do not enable referrals until AFTER you have a working directory
# service AND an understanding of referrals.
#referral       ldap://root.openldap.org

pidfile         /var/run/openldap/slapd.pid
argsfile        /var/run/openldap/slapd.args

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap

# modules available in openldap-servers-overlays RPM package:
# moduleload accesslog.la
# moduleload auditlog.la
# moduleload denyop.la
# moduleload dyngroup.la
# moduleload dynlist.la
# moduleload lastmod.la
# moduleload pcache.la
# moduleload ppolicy.la
# moduleload refint.la
# moduleload retcode.la
# moduleload rwm.la
# moduleload smbk5pwd.la
# moduleload syncprov.la
# moduleload translucent.la
# moduleload unique.la
# moduleload valsort.la
access to * by * write
# access to *
#       by self write
#       by users read
##      by anonymous auth
#
# if no access controls are present, the default policy
# allows anyone and everyone to read anything but restricts
# updates to rootdn.  (e.g., "access to * by * read")
#
# rootdn can always read and write EVERYTHING!

#######################################################################
# ldbm and/or bdb database definitions
#######################################################################
database        bdb
suffix dc=cmsqalab,dc=com
rootdn cn=Manager,dc=cmsqalab,dc=com
# Cleartext passwords, especially for the rootdn, should
# be avoided.  See slappasswd(8) and slapd.conf(5) for details.
# Use of strong authentication encouraged.
# rootpw                secret
# rootpw                {crypt}ijFYNcSNctBYg
rootpw  {SSHA}+1DFJ0tLWAd1u3zDUw04rDtnwPKbEFy9

# The database directory MUST exist prior to running slapd AND
# should only be accessible by the slapd and slap tools.
# Mode 700 recommended.
directory       /var/lib/ldap/cmsqalab.com

# Indices to maintain for this database
index objectClass                       eq,pres
index ou,cn,mail,surname,givenname      eq,pres,sub
index uidNumber,gidNumber,loginShell    eq,pres
index uid,memberUid                     eq,pres,sub
index nisMapName,nisMapEntry            eq,pres,sub

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