diff --git a/diary_env.example.rb b/diary_env.example.rb
index efffc76..96af3fb 100644
--- a/diary_env.example.rb
+++ b/diary_env.example.rb
@@ -17,7 +17,11 @@ class DiaryEnv
     DB_DATABASE = "diary"
 
     LDAP_HOST = 'ldap.example.com'
+    LDAP_PORT = 389
     LDAP_ROOT = "ou=People,dc=example,dc=com"
+    LDAP_VER = 3
+    LDAP_BIND_DN = ""
+    LDAP_BIND_PW = ""
 
     HOME_ORGANIZATION = "Example ORG"
     HOME_OU = "Employees"
@@ -31,8 +35,12 @@ class DiaryEnv
     def initialize
         @confirmation = Array.new
         Person.setup(:host => LDAP_HOST,
-                         :root => LDAP_ROOT,
-                         :key => "uid")
+                     :port => LDAP_PORT,
+                     :root => LDAP_ROOT,
+                     :ver => LDAP_VER,
+                     :binddn => LDAP_BIND_DN,
+                     :bindpw => LDAP_BIND_PW,
+                     :key => "uid")
         Person.set_local(HOME_ORGANIZATION, HOME_OU)
         DataMapper.setup(:adapter =>  "Mysql",
                          :database => DB_DATABASE,
diff --git a/ldap_record.rb b/ldap_record.rb
index d5217ef..a23ab73 100644
--- a/ldap_record.rb
+++ b/ldap_record.rb
@@ -5,7 +5,7 @@
 # Class LdapRecord for Diary Management Application.
 #
 
-require 'ldap_cache'
+require_relative 'ldap_cache'
 require 'net/smtp'
 
 class LdapRecord
@@ -17,6 +17,12 @@ class LdapRecord
         raise "Invalid parameters" unless args.is_a? Hash
         raise "LDAP server is not specified" unless args[:host]
         @@ldap = LDAP::Conn.new(args[:host], args[:port] || LDAP::LDAP_PORT)
+        if args[:ver] == 3
+          @@ldap.set_option(LDAP::LDAP_OPT_PROTOCOL_VERSION, 3)
+        end
+        if args[:binddn] != ""
+          @@ldap.bind(args[:binddn], args[:bindpw])
+        end
         #@@ldap.bind  # Bind is optional for LDAPv3
 
         raise "LDAP tree root is not specified" unless args[:root]