Could not authorize you from LDAP because "Invalid credentials"

I can't connect my LDAP (samba4) with my Gitlab 7.3, it gives me always the same error "Could not authorize you from LDAP because "Invalid credentials""

*LDAP config:

• ldap:
  • enabled: true
  • host: 'domain.net'
  • port: 389
  • uid: 'sAMAccountName'
  • base: 'cn=Users,dc=domain,dc=net'
  • method: 'plain'
  • bind_dn: 'cn=administrator,cn=Users,dc=domain,dc=net'
  • password: 'password'

*LDAP Check:

• sudo -u git -H bundle exec rake gitlab:ldap:check RAILS_ENV=productio
• Checking LDAP ...
• LDAP users with access to your GitLab server (only showing the first 100 results)
• Checking LDAP ... Finished I don't know what to do :( can someone help me