[turba] No result matched in turba search

[=?big5?b?sWmofaTl?=]

Hi there:
I used Horde head version,and have such problem in turba search.

If i select "Email" as key from a LDAP backend address book and enter keyword
e.g david in matching column there are nothing returned.And if i select some
column other than "Email" everything work fine.

P.S david.tmv.gov.tw have already exist in LDAP backend address book,and here
are the turba/config/source.php for it.

$cfgSources['tmv_ldap'] = array(
    'title' => _("Shared Directory"),
    'type' => 'ldap',
    'params' => array(
        'server' => 'example.tmv.gov.tw',
        'port' => 389,
        'root' => 'dc=tmv',
        'bind_dn' => 'cn=root,dc=example',
        'bind_password' => 'password',
        'sizelimit' => 1200,
        'dn' => array('cn'),
        'objectclass' => array('person',
                               'organizationalPerson','inetOrgPerson'),
        'charset' => 'utf-8',
        'version' => 3
    ),
    'map' => array(
        '__key' => 'dn',
        'name' => 'cn',
        'email' => 'maillocaladdress',
        'unit' => 'roomnumber',
        'homePhone' => 'homephone',
        'workPhone' => 'telephonenumber',
        'cellPhone' => 'mobile',
        'uid' => 'uid'
        // 'freebusyUrl' => 'calFBURL'
    ),
    'search' => array(
        'name',
        'email',
        'homePhone',
        'workPhone',
        'cellPhone',
        'unit',
        'uid'
    ),
    'strict' => array(
        'dn',
    ),
    'public' => true,
    'readonly' => true,
    'admin' => array('david at tmv.gov.tw'),
    'export' => false
);