android webservice调用wsdl

一直报xml解析错误:谁知道原因public class WebService { public void login(String name,String password){
//WSDL文档中的命名空间   
    final String targetNameSpace="urn:Users"; 

String methodName = "ClentLogin" ;
//WSDL文档中的URL   
final String WSDL="http://124.42.77.77/api/center/Users";

SoapObject soapObject=new SoapObject(targetNameSpace,methodName);     
//调用的方法参数与参数值（根据具体需要可选可不选）

soapObject.addProperty("sitekey", "");
soapObject.addProperty("sitepwd", "");
soapObject.addProperty("option", "");
soapObject.addProperty("username", name);
soapObject.addProperty("password", password);

// 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本
SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER10);      
// 设置是否调用的是dotNet开发的WebService
//envelope.dotNet=false; 
//envelope.bodyOut = soapObject; 
envelope.setOutputSoapObject(soapObject);

HttpTransportSE httpTransportSE = new HttpTransportSE(WSDL);

try {

httpTransportSE.call(targetNameSpace+methodName, envelope);   

SoapObject result=(SoapObject)envelope.getResponse();

int count=result.getPropertyCount();     
for(int index=0;index<count;index++){       
result.getProperty(index).toString();       
}
} catch (Exception e) {
e.printStackTrace();
}
}}