Invalid credentials (49) problem

[Muhammad Najmi Ahmad Zabidi <najmi.zabidi@gmail.com>]

hello,

i try to configure openldap on centos 4.0

this is my output:

ldapadd -x -h 127.0.0.1 -D 
"cn=Manager,dc=my-domain,dc=com" -w secret -f cuba.ldif 
ldap_bind: Invalid credentials (49)

this is my cuba.ldif
-----------------------------------------------------------------------------------------------
dn: dc=my-domain,dc=com
objectclass: dcObject
objectclass: organization
o: Example Company
dc: my-domain

# Organizational Role for Directory Manager
dn: cn=Manager,dc=my-domain,dc=com
objectClass: organizationalRole
cn: Manager
description: Directory Manager
-----------------------------------------------------------------------------------------------

this is my slapd.conf
-----------------------------------------------------------------------------------------------
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/nis.schema
allow bind_v2

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


database bdb

suffix "dc=my-domain,dc=com"
rootdn "cn=Manager,dc=my-domain,dc=com"


rootpw secret

directory /var/lib/ldap

# 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


binddn="cn=Manager,dc=my-domain,dc=com"

loglevel 1
-----------------------------------------------------------------------------------------------


what went wrong actually?
I went thru the details for slapd.conf and cuba.ldif,shouldn't be wrong. or 
i mislook anything?