Problem: ldap_bind: Invalid credentials (49)

Hi all..
I try to add ldif file but I found error:

ldap_bind: Invalid credentials (49)

I use Ubuntu 9.04

/etc/ldap/slapd.conf
==============
# Make sure you edit or add these directives after the first 'database'
directive.

suffix          "dc=example,dc=com"
directory       "/var/lib/ldap"
rootdn          "cn=admin,dc=example,dc=com"
rootpw          {SSHA}b7Jy+
04HxRvtDWbsZwsYuQrU7YTzFrWl

admin.ldif
==============
dn: dc=ceenet,dc=example,dc=com
objectclass: dcObject
objectclass: organization
dc: ceenet
o: CEENET Workshop 2001

dn:cn=Manager,dc=ceenet,dc=example,dc=com
objectclass: organizationalRole
cn: Manager


I following command:
===============

$ ldapadd -x -h localhost -D cn=admin,dc=example,dc=com -W -f admin.ldif
Enter LDAP Password: xxxxx
ldap_bind: Invalid credentials (49)

Can any one help me?