Android调用ASMX报错 Compiled from InvocationTargetException.java

我下载了并导入了jar包，添加了<uses-permission android:name="android.permission.INTERNET" /> 然后写了几行代码
private static String SOAP_ACTION = "http://www.youerw.com/ HelloWorld";
private static String NAMESPACE = "http://www.youerw.com/";
private static String METHOD_NAME = "HelloWorld";

private static String URL = "http: // 192.168.1.100:92 /MyWebService.asmx?WSDL";

@Override
  public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
   
  //Initialize soap request + add parameters
  try
  {
  SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
  }
  catch(Exception e)
  {
  String a = e.getMessage();
  }
   
   
  }

就这么几行简单的代码，一执行到SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);就出错，会说什么Source Not Found的错误:
// Compiled from InvocationTargetException.java (version 1.5 : 49.0, super bit)

Android开发环境ADT17 以后，要引用一个jar包，除了象之前添加引用后，还需要在Order and Export中选中这个包。
具体来说就是：选中工程->Java Build Path->选中标签Order and Export->选中没有找到的class的jar包或者包含的工程->点击OK。