[turba] LDAP random uid not working

[Max-4004]

Hi,
Turba with ldap works fine. But I like to use an random uid für the dn 
entries. Turba generats me a random uid attribute 
(20050222160541.6bwjjc7tekw8 at domain) for every entry.
But for the dn uses the cn. like
cn=tom,ou=Address Book,cn=max,ou=people,dc=domain

I want:
uid=20050222160541.6bwjjc7tekw8 at domain,ou=Address 
Book,cn=max,ou=people,dc=domain
so that I can store two or more entries with cn=tom.

If I delete the cn from the dn array, turba tries to add the entry
ou=Address Book,cn=max,ou=people,dc=domain
so the uid is probably emty and not used.

Help is very welcome!
THX

Here my config:

$basedn = 'ou=people,dc=xxx';
$cfgSources['personal_ldap'] = array(
    'title' => 'Globales Adressbuch',
    'type' => 'ldap',
    'params' => array(
        'server' => 'localhost',
        'root' => 'ou=Address Book,cn=' . $uid . ','. $basedn,
        'bind_dn' => 'cn='.$uid.','.$basedn,
        'bind_password' => $pw, //Auth::getCredential('password'),
        'dn' => array('uid','cn'),
        'objectclass' => array('top',
                               'person',
                               'inetOrgPerson',
                               'mozillaorgperson',
                               'organizationalPerson'),
        'charset' => 'utf-8',
        'version' => 3
    ),