ошибка соединения с LDAP?

Я пытаюсь запустить следующая программа:

package jndi;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;


public class LDAPRead {

    public static void main(String[] args) {

        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=jaydeetechnology");
        try{
            System.out.println("creating initial directory context");
            DirContext ctx = (DirContext) new InitialContext(env);
            System.out.println("search for john hunt");
            Attributes attrs = ctx.getAttributes("cn=John Hunt , ou=JayDeeTechnology");
            System.out.println("find the surname and print it");
            System.out.println("sn: "+attrs.get("sn").get());
            ctx.close();
        }catch(NamingException e){
            e.printStackTrace();
        }
    }

}

, но я получаю сообщение об ошибке «Соединение отклонено».Может ли кто-нибудь помочь мне, если я чего-то упускаю?

creating initial directory context
javax.naming.CommunicationException: localhost:389 [Root exception is java.net.ConnectException: Connection refused: connect]
    at com.sun.jndi.ldap.Connection.<init>(Connection.java:222)
    at com.sun.jndi.ldap.LdapClient.<init>(LdapClient.java:130)
    at com.sun.jndi.ldap.LdapClient.getInstance(LdapClient.java:1592)
    at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2664)
    at com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:305)
    at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:187)
    at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:205)
    at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:148)
    at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:78)
    at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:235)
    at javax.naming.InitialContext.initializeDefaultInitCtx(InitialContext.java:318)
    at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:348)
    at javax.naming.InitialContext.internalInit(InitialContext.java:286)
    at javax.naming.InitialContext.<init>(InitialContext.java:211)
    at jndi.LDAPRead.main(LDAPRead.java:31)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:383)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:245)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:232)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:377)
    at java.net.Socket.connect(Socket.java:539)
    at java.net.Socket.connect(Socket.java:488)
    at java.net.Socket.<init>(Socket.java:385)
    at java.net.Socket.<init>(Socket.java:199)
    at com.sun.jndi.ldap.Connection.createSocket(Connection.java:364)
    at com.sun.jndi.ldap.Connection.<init>(Connection.java:199)
    ... 14 more

Я использую RSA 8.0