WCF service working on debug but not working when calling from android -

i created wcf service in visual studio 2012 intend consume in xamarin , have save user registration information table in sql server. service works fine when debugging in visual studio, data entries save table in sql. want consume service in xamarin , here code:

     using system;      using system.collections.generic;      using system.data;      using system.data.sqlclient;      using system.linq;      using system.runtime.serialization;      using system.servicemodel;      using system.servicemodel.web;      using system.text;      using itusservice;        using android.app;      using android.locations;      using android.os;      using android.util;      using android.widget;       //some code here...       public static readonly endpointaddress endpoint = new endpointaddress("http://192.168.1.155:12100/service1.svc");       private service1client service;       protected override void oncreate (bundle bundle)      {          //some code here...          initializeservice1client();      }      private void initializeservice1client()     {         basichttpbinding binding = new basichttpbinding ();         service = new service1client(binding, endpoint);     }     async void addressbutton_onclick(object sender, eventargs eventargs)     {         //some code here...         userlocation useraddress = new userlocation ();         useraddress.clientid = _client.text = "ddsdfs";         useraddress.fullname = _name.text = "dsffdf";         useraddress.locationcoordinates = _locationtext.text;         useraddress.locationaddress = _addresstext.text;         useraddress.distresstime = _time.text = "djdsk";         string result = service.tostring ();         _resulttxt.text = result;     } 

i don't know if there missing out because nothing being saved sql table android device. debug using both emulator , device, nothing has been saved using both. have opened port listening, have created reference file using silverlight slsvc tool according xamarin walkthrough http://developer.xamarin.com/guides/cross-platform/application_fundamentals/web_services/walkthrough_working_with_wcf/ have tried possibly can. please help.

the general pattern calling wcf method (this general wcf , has nothing xamarin or android)

// create client , bind client = new serviceclient(binding, endpoint);  // specify callback client.getlocationcompleted += ongetlocationcompleted;  // make request method, passing required parameters client.getlocationasync(useraddress); 

because wcf call async, need provide callback method (the naming of eventargs class depend on how service defined)

public void ongetlocationcompleted(object sender, getlocationcompletedeventargs args) {    // if bad happend, args.error contain exception   // otherwise args.result contain return value method  }