Попробуйте добавить типа такого:
uri ldap://127.0.0.1/
И проверить, что сервер отвечает через ldapsearch или типа того.
Уже делал это не помогает таже ошибка
ldapsearch -LLL -x -b 'dc=dk,dc=com'
dn: dc=dk,dc=com
objectClass: dcObject
objectClass: organization
objectClass: top
dc: dk
o: dk
dn: ou=users,dc=dk,dc=com
objectClass: top
objectClass: organizationalUnit
ou: users
dn: ou=groups,dc=dk,dc=com
objectClass: top
objectClass: organizationalUnit
ou: groups
dn: ou=computers,dc=dk,dc=com
objectClass: top
objectClass: organizationalUnit
ou: computers
dn: cn=admins,ou=groups,dc=dk,dc=com
objectClass: posixGroup
objectClass: sambaGroupMapping
cn: admins
gidNumber: 10001
sambaSID: S-1-5-21-642681324-2247102539-4081808397-512
sambaGroupType: 2
displayName: admins
description: Domain Unix group
dn: cn=people,ou=groups,dc=dk,dc=com
objectClass: posixGroup
objectClass: sambaGroupMapping
cn: people
gidNumber: 10002
sambaSID: S-1-5-21-642681324-2247102539-4081808397-513
sambaGroupType: 2
displayName: people
description: Domain Unix group
dn: cn=computers,ou=groups,dc=dk,dc=com
objectClass: posixGroup
objectClass: sambaGroupMapping
cn: computers
gidNumber: 10003
sambaSID: S-1-5-21-642681324-2247102539-4081808397-515
sambaGroupType: 2
displayName: computers
description: Domain Unix group
dn: uid=testuser,ou=users,dc=dk,dc=com
objectClass: account
objectClass: posixAccount
objectClass: sambaSamAccount
cn: testuser
uid: testuser
uidNumber: 10001
gidNumber: 10002
homeDirectory: /home/testuser
loginShell: /usr/sbin/nologin
gecos: testuser
description: User account
sambaSID: S-1-5-21-642681324-2247102539-4081808397-21002
displayName: testuser
sambaLMPassword: AEBD4DE384C7EC43AAD3B435B51404EE
sambaNTPassword: 7A21990FCD3D759941E45C490F143D5F
sambaPasswordHistory: 00000000000000000000000000000000000000000000000000000000
00000000
sambaPwdLastSet: 1283236433
sambaAcctFlags: [U ]
dn: uid=admin,ou=users,dc=dk,dc=com
objectClass: account
objectClass: posixAccount
objectClass: sambaSamAccount
cn: admin
uid: admin
uidNumber: 10002
gidNumber: 10001
homeDirectory: /home/admin
loginShell: /usr/sbin/nologin
gecos: admin
description: User account
sambaSID: S-1-5-21-642681324-2247102539-4081808397-21004
displayName: admin
sambaLMPassword: AEBD4DE384C7EC43AAD3B435B51404EE
sambaNTPassword: 7A21990FCD3D759941E45C490F143D5F
sambaPasswordHistory: 00000000000000000000000000000000000000000000000000000000
00000000
sambaPwdLastSet: 1283236411
sambaAcctFlags: [U ]
dn: sambaDomainName=DK,dc=dk,dc=com
sambaDomainName: DK
sambaSID: S-1-5-21-642681324-2247102539-4081808397
sambaAlgorithmicRidBase: 1000
objectClass: sambaDomain
sambaNextUserRid: 1000
sambaMinPwdLength: 5
sambaPwdHistoryLength: 0
sambaLogonToChgPwd: 0
sambaMaxPwdAge: -1
sambaMinPwdAge: 0
sambaLockoutDuration: 30
sambaLockoutObservationWindow: 30
sambaLockoutThreshold: 0
sambaForceLogoff: -1
sambaRefuseMachinePwdChange: 0
sambaNextRid: 1001
dn: uid=pdc$,ou=computers,dc=dk,dc=com
objectClass: account
objectClass: posixAccount
objectClass: sambaSamAccount
cn: pdc$
uid: pdc$
uidNumber: 20001
gidNumber: 10003
homeDirectory: /dev/null
loginShell: /bin/false
gecos: pdc$
description: Machine account
sambaSID: S-1-5-21-642681324-2247102539-4081808397-1001
displayName: pdc$
sambaLMPassword: 499E305B64451B05D156B112603C0320
sambaNTPassword: C09C84ABD46DA798C2AA5B3F58DD2612
sambaAcctFlags: [S ]
Есть еще утилитка для винды ldapadmin, вот она прекрасно подключается к лдар серверу