How to use plugin-x in JSB

How to use plugin-x in cocos2d-x JSB 2.2.3?

so do I. I create new project. And write

var pluginManager = plugin.PluginManager.getInstance();
this.PluginIAP = pluginManager.loadPlugin("AnalyticsUmeng");
this.PluginIAP.setListener(this);

and the console said: plugin not defined…

My JSB version is 3.0 RC.

please help me

simply call java from javascript using jsb.reflection : How we can open a link click on a button in cocos2d-x javascirt

and before this simply write the java code for the plugin:
http://www.cocos2d-x.org/wiki/How_to_Integrate_a_3rd_party_SDK_into_Plugin-X

// Java code in plugin, the method of plugin implement like this:
   protected void logEventWithDuration(JSONObject eventInfo) {
    LogD("logEventWithDuration invoked! event : " + eventInfo.toString());
    if (!isValid()) return;
    try{
        String eventId = eventInfo.getString("Param1");  // get param eventID by key "Param1"
        int duration = eventInfo.getInt("Param2");          // get param duration by key "Param2"
        MobclickAgent.onEventDuration(mContext, eventId, duration);
    } catch(Exception e){
        LogE("Exception in logEventWithDuration", e);
    }
}

DO NOT USE JSONObject INPUT PARAM TYPE, FIRST READ THE DOCS ABOUT JSP.REFLECTION

https://github.com/chukong/cocos-docs/blob/master/manual/framework/html5/v3/reflection/en.md

OR

go trough this tutorial:

https://github.com/chukong/cocos-docs/blob/master/manual/framework/html5/v3/plugin-x/how-to-use-plugin-x-on-android/en.md