Ldapmodify giving Insufficient Access

[lin s <lin_lin123@yahoo.com>]

hi all,

I have tried adding some entries using ldapaddd.
Ldapsearch gives me the following result:-

$ ldapsearch -x -b 'dc=ubm,dc=com,dc=edu'
'(objectclass=*)'

#
# filter: (objectclass=*)
# requesting: ALL
#

# ubm, dc=ubm, dc=com, dc=edu
dn: dc=ubm, dc=com, dc=edu
objectClass: dcObject
objectClass: organisation
dc: ubm

# Admin, dc=ubm, dc=com, dc=edu
dn: cn=Admin, dc=ubm, dc=com, dc=edu
objectClass: organizationalRole
cn:: TWFuYWdlciA=

# xyz, dc=ubm, dc=com, dc=edu
dn: cn=xyz, dc=ubm, dc=com, dc=edu
objectClass: organizationalRole
cn:: eHl6IA=

# Abc, dc=ubm, dc=com, dc=edu
dn: cn=Abc, dc=ubm, dc=com, dc=edu
objectClass: organizationalRole
cn:: TWFuYWdlciA=

# search result
search: 2
result: 0 Success

# numResponses: 5
# numEntries: 4 
$


After this i tried  modifying a entry say "xyz" using
ldapmodify.
It gives me the following result with the error
message
Insufficient access.

$ ldapmodify -x -v -f example.ldif
ldap_initialize( <DEFAULT> )
add objectclass:
        organizationalRole
add cn:
        xyz
modifying entry "cn=xyz,dc=ubm,dc=com,dc=edu"
ldap_modify: Insufficient access

ldif_record() = 50
$

My example.ldif file looks this way

dn: cn=xyz,dc=ubm,dc=com,dc=edu
objectclass: organizationalRole
cn: xyz


Why do i get the Insufficient access error?
How can i correct it?



Thanxs 
Lin s

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