Xmpp connection error on smack 4.1.1

i’v test connection between eclipse with Smack 4.1.1 and openfire4.0.4 in localhost, but got some error. please help me

Thank you in advance.

12-11 07:34:29.171: E/AndroidRuntime(17961): FATAL EXCEPTION: AsyncTask #4

12-11 07:34:29.171: E/AndroidRuntime(17961): Process: com.wqx.im, PID: 17961

12-11 07:34:29.171: E/AndroidRuntime(17961): java.lang.RuntimeException: An error occured while executing doInBackground()

12-11 07:34:29.171: E/AndroidRuntime(17961): at android.os.AsyncTask$3.done(AsyncTask.java:304)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.FutureTask.run(FutureTask.java:242)

12-11 07:34:29.171: E/AndroidRuntime(17961): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.Thread.run(Thread.java:818)

12-11 07:34:29.171: E/AndroidRuntime(17961): Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lorg/jxmpp/util/XmppStringUtils;

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.provider.ProviderManager.getKey(ProviderManager.java:314 )

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.provider.ProviderManager.addStreamFeatureProvider(Provid erManager.java:304)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.provider.ProviderManager.addLoader(ProviderManager.java: 140)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.initializer.UrlInitializer.initialize(UrlInitializer.jav a:54)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackInitialization.loadSmackClass(SmackInitialization.j ava:232)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackInitialization.parseClassesToLoad(SmackInitializati on.java:193)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitializatio n.java:163)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitializatio n.java:148)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackInitialization.(SmackInitialization.java:11 6)

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96 )

12-11 07:34:29.171: E/AndroidRuntime(17961): at org.jivesoftware.smack.ConnectionConfiguration.(ConnectionConfiguration .java:38)

12-11 07:34:29.171: E/AndroidRuntime(17961): at com.wqx.im.utils.ConnectionManager.openConnection(ConnectionManager.java:25)

12-11 07:34:29.171: E/AndroidRuntime(17961): at com.wqx.im.utils.ConnectionManager.getConnection(ConnectionManager.java:18)

12-11 07:34:29.171: E/AndroidRuntime(17961): at com.wqx.im.activity.LoginActivity$LoginTask.doInBackground(LoginActivity.java:5 4)

12-11 07:34:29.171: E/AndroidRuntime(17961): at com.wqx.im.activity.LoginActivity$LoginTask.doInBackground(LoginActivity.java:1 )

12-11 07:34:29.171: E/AndroidRuntime(17961): at android.os.AsyncTask$2.call(AsyncTask.java:292)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.util.concurrent.FutureTask.run(FutureTask.java:237)

12-11 07:34:29.171: E/AndroidRuntime(17961): … 4 more

12-11 07:34:29.171: E/AndroidRuntime(17961): Caused by: java.lang.ClassNotFoundException: Didn’t find class “org.jxmpp.util.XmppStringUtils” on path: DexPathList[[zip file “/data/app/com.wqx.im-2/base.apk”],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]

12-11 07:34:29.171: E/AndroidRuntime(17961): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.ClassLoader.loadClass(ClassLoader.java:469)

12-11 07:34:29.171: E/AndroidRuntime(17961): … 21 more

12-11 07:34:29.171: E/AndroidRuntime(17961): Suppressed: java.lang.ClassNotFoundException: org.jxmpp.util.XmppStringUtils

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.Class.classForName(Native Method)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.BootClassLoader.findClass(ClassLoader.java:781)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)

12-11 07:34:29.171: E/AndroidRuntime(17961): at java.lang.ClassLoader.loadClass(ClassLoader.java:504)

12-11 07:34:29.171: E/AndroidRuntime(17961): … 22 more

12-11 07:34:29.171: E/AndroidRuntime(17961): Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

this is my code

import org.jivesoftware.smack.AbstractXMPPConnection;

import org.jivesoftware.smack.ConnectionConfiguration.SecurityMode;

import org.jivesoftware.smack.tcp.XMPPTCPConnection;

import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;

import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration.Builder;

public class ConnectionManager {

private static AbstractXMPPConnection connection = null;

private static String host = “192.168.31.91”;

private static int port = 5222;

private static String serviceName =“192.168.31.91”;

public static AbstractXMPPConnection getConnection(){

if(connection == null){

openConnection();

}

return connection;

}

private static void openConnection() {

// TODO Auto-generated method stub

Builder builder = XMPPTCPConnectionConfiguration.builder();

builder.setHost(host);

builder.setPort(port);

builder.setServiceName(serviceName);

builder.setSecurityMode(SecurityMode.disabled);

connection = new XMPPTCPConnection(builder.build());

try{

connection.connect();

}catch(Exception e){

e.printStackTrace();

}

}

public static void release(){

if(connection != null){

connection.disconnect();

}

}

}