Endpoint not found wcf rest service

[WebInvoke(UriTemplate = "/Login/{iUserName}/{iPassword}", Method = "GET", ResponseFormat = WebMessageFormat.Json)]
        Users Login(string iUserName, string iPassword);
        [WebInvoke(UriTemplate = "/Changepassword/{iUserName}/{iPassword}/{iOldPass}", Method = "GET", ResponseFormat = WebMessageFormat.Json)]
        string Changepassword(string iUserName, string iPassword, string iOldPass);

public Users Login(string iUserName, string iPassword)
        {
            return Global.ListUsers.Where(p => p.Value.Username.ToUpper() == iUserName.ToUpper() && p.Value.Pass_word == iPassword).Select(p => p.Value).FirstOrDefault();
        }

        public string Changepassword(string iUserName, string iPassword, string iOldPass)
        {
            return "OK";
        }

private void OpenWebHost()
        {
            try
            {
                urlService = "http://192.168.1.251:33323";
                web = new WebServiceHost(typeof(TrackingCore.Android), new Uri(urlService));
                WebHttpBinding binding = new WebHttpBinding();
                binding.TransferMode = TransferMode.StreamedResponse;
                web.AddServiceEndpoint(typeof(TrackingCore.iAndroid), binding, "Android");
                web.Open();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }