Redmine

Hello.
Something strange happens with redmine during AD user login. It returns "Internal error". Everything was fine before today.
In logs i found this message.

Processing AccountController#login (for 192.168.1.93 at 2012-04-19 14:59:13) [POST]
  Parameters: {"back_url"=>"http%3A%2F%2Fspb-tfs%3A345%2Fredmine%2F", "action"=>"login", "authenticity_token"=>"2FCKBQo1gUi3pAbhYatLegqHu7Mmo5SO/TMUVz9G8rs=", "username"=>"andrey.paltusov", "controller"=>"account", "password"=>"[FILTERED]", "login"=>"Вход »"}
  [4;35;1mSQL (0.0ms)[0m   [0mSELECT max(`settings`.updated_on) AS max_updated_on FROM `settings` [0m
  [4;36;1mAnonymousUser Load (1.0ms)[0m   [0;1mSELECT * FROM `users` WHERE ( (`users`.`type` = 'AnonymousUser' ) ) LIMIT 1[0m
  [4;35;1mUser Load (1.0ms)[0m   [0mSELECT * FROM `users` WHERE (BINARY login = 'andrey.paltusov') AND ( (`users`.`type` = 'User' OR `users`.`type` = 'AnonymousUser' ) ) LIMIT 1[0m
  [4;36;1mAuthSource Load (0.0ms)[0m   [0;1mSELECT * FROM `auth_sources` WHERE (`auth_sources`.`id` = 1) [0m

Errno::ECONNRESET (��������� ���� ������������� �������� ������������ �����������. - SSL_connect):
  app/models/auth_source_ldap.rb:109:in `get_user_dn'
  app/models/auth_source_ldap.rb:36:in `authenticate'
  app/models/user.rb:133:in `try_to_login'
  app/controllers/account_controller.rb:147:in `password_authentication'
  app/controllers/account_controller.rb:142:in `authenticate_user'
  app/controllers/account_controller.rb:30:in `login'
  config/initializers/mongrel_cluster_with_rails_211_fix.rb:62:in `dispatch_cgi'

Rendering C:/Program Files/BitNami Redmine Stack/apps/redmine/public/500.html (500 Internal Server Error)