below is my code....by executing this i am getting as error as invalid credentials

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import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.
NamingEnumeration;
import javax.naming.NamingException;

public class SimpleBindDemo {

public static void main(String[] args) throws NamingException {

if (args.length < 2) {
System.err.println("Usage: java SimpleBindDemo <userDN>
<password>");
System.exit(1);
}

Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");

env.put(Context.PROVIDER_URL, "ldap://localhost:389/");

env.put(Context.SECURITY_AUTHENTICATION, "simple");
//env.put(Context.SECURITY_PRINCIPAL,"cn=Manager,ou=People,dc=example,dc=com");
//env.put(Context.SECURITY_CREDENTIALS,"ldap123");
env.put(Context.SECURITY_PRINCIPAL,args[0]);
env.put(Context.SECURITY_CREDENTIALS,args[1]);

try {
Context ctx = new InitialContext(env);
NamingEnumeration enm = ctx.list("");

while (enm.hasMore()) {
System.out.println(enm.next());
}

enm.close();
ctx.close();
} catch (NamingException e) {
System.out.println(e.getMessage());
}
}
}