Active directory Change password - Java - active-directory

Question

I am trying to change the password of Active directory user and get error code 65. Please see below the source code I used.
public class ADConnection {
DirContext ldapContext;
String baseName = ",CN=Users,DC=wso2,DC=test";
public ADConnection() {
try {
Hashtable ldapEnv = new Hashtable(11);
ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
ldapEnv.put(Context.PROVIDER_URL, "ldaps://192.168.18.xx:636");
ldapEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
ldapEnv.put(Context.SECURITY_PRINCIPAL, "cn=administrator"
+ baseName);
ldapEnv.put(Context.SECURITY_CREDENTIALS, "xxxxxx");
ldapEnv.put(Context.SECURITY_PROTOCOL, "ssl");
ldapContext = new InitialDirContext(ldapEnv);
} catch (Exception e) {
System.out.println(" bind error: " + e);
e.printStackTrace();
System.exit(-1);
}
}
public void updatePassword(String username, String password) {
try {
String quotedPassword = "\"" + password + "\"";
char unicodePwd[] = quotedPassword.toCharArray();
byte pwdArray[] = new byte[unicodePwd.length * 2];
for (int i = 0; i < unicodePwd.length; i++) {
pwdArray[i * 2 + 1] = (byte) (unicodePwd[i] >>> 8);
pwdArray[i * 2 + 0] = (byte) (unicodePwd[i] & 0xff);
}
ModificationItem[] mods = new ModificationItem[1];
mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE,
new BasicAttribute("UnicodePwd", pwdArray));
ldapContext.modifyAttributes("cn=" + username + baseName, mods);
//ldapContext.modifyAttributes("cn=" + username, mods);
} catch (Exception e) {
System.out.println("update password error: " + e);
System.exit(-1);
}
}
public static void main(String[] args) {
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
// the keystore that holds trusted root certificates
System.setProperty("javax.net.ssl.trustStore", "client-truststore.jks");
//System.setProperty("javax.net.debug", "all");
ADConnection adc = new ADConnection();
adc.updatePassword("admin", "pass#word3");
}
}
I used the code from following link.
http://blogs.msdn.com/b/alextch/archive/2012/05/15/how-to-set-active-directory-password-from-java-application.aspx
What is the wrong with this ?
Thanks