What's wrong with my code?It run well in my localhost,but after publish it is wrong using postAsyc

try
 {
  string ip="192.165.0.6";//in fact,it is read from database
  HttpClient httpClient = new HttpClient() { BaseAddress = new Uri("http://"+ip+"/User") };
  var checkParams = new Dictionary<string, string>() {
  { "UserName","Lyly"},
  { "Password", "123456"}
  };
 var validResponse = httpClient.PostAsync("http://"+ip+"/User/CheckUserValid", new FormUrlEncodedContent(checkParams)).Result;
  if (validResponse.StatusCode == HttpStatusCode.OK && validResponse.Content.ReadAsStringAsync().Result.Contains("ValidSuccess"))
  {
    var PointData= new Dictionary<string, string>() {
   { "Math","86"},
     { "English", "90"}, 
   };

 var getResultResponse = httpClient.PostAsync("http://"+ip+"/User/SendPointData", new FormUrlEncodedContent(PointData)).Result;
  if (getResultResponse.StatusCode == HttpStatusCode.OK)
    {
      if (getResultResponse.Content.ReadAsStreamAsync().Result != null)
      {
      var reader = new StreamReader(getResultResponse.Content.ReadAsStreamAsync().Result);
      var lastResutl= JsonHelper.FromJson<LastRest>(reader.ReadToEnd());
      }
    else return "Status1";
    }
   else return "Status2";
 }
else return "Status3";
}
catch(Exception e){
return e.StackTrace;
 }