HTTP Post not working I am wanting to POST some data from Arduino to WebService (written in .NET), intending to save some temperature data to MS SQL Server.

My code in arduino is:

void PostarDados(String dados, String chamador) {
  if (client.connect("mysite.com.br",80)) {
    client.println(chamador);
    client.println(F("Host: mysite.com.br"));
    client.println(F("Content-Type: application/x-www-form-urlencoded"));
    client.print(F("Content-Length: "));
    client.println(dados.length());
    client.println();
    client.println(dados);
  }
  if (client.connected()) client.stop();
}


When sending to Serial instead of client, I am obtaining the following text:

POST /webservice.asmx/SetValoresTempUmidade HTTP/1.1
Host: mysite.com.br
Content-Type: application/x-www-form-urlencoded
Content-Length: 39

Chave=1&amp;Temperatura=23.30&amp;Umidade=42.20


I have enabled HTTP POST in web.config to make HTTP POST possible (I can successfully invoke webservice from browser):

  &lt;location path="Webservice.asmx"&gt;
    &lt;system.web&gt;
      &lt;webServices&gt;
        &lt;protocols&gt;
          &lt;add name="HttpGet"/&gt;
          &lt;add name="HttpPost"/&gt;
        &lt;/protocols&gt;
      &lt;/webServices&gt;
    &lt;/system.web&gt;
  &lt;/location&gt;
  &lt;system.webServer&gt;
    &lt;httpProtocol&gt;
      &lt;customHeaders&gt;
        &lt;add name="Access-Control-Allow-Origin" value="*" /&gt;
        &lt;add name="Access-Control-Allow-Headers" value="Content-Type" /&gt;
      &lt;/customHeaders&gt;
    &lt;/httpProtocol&gt;
  &lt;/system.webServer&gt;
&lt;/configuration&gt;


I have also set ScriptMethod to my webservice functions:

&lt;WebMethod()&gt; &lt;ScriptMethod(ResponseFormat:=ResponseFormat.Json, UseHttpGet:=True)&gt;
Public Sub SetValoresTempUmidade(Chave As Integer, ByVal Temperatura As Double, ByVal Umidade As Double)
    Dim ctx As New DataClassesDataContext
    Try
        Dim A As New TBL_DADO
        A.CHAVE_INICIO = Chave
        A.DATA = Now
        A.TEMPERATURA = Temperatura
        A.UMIDADE = Umidade
        ctx.TBL_DADOs.InsertOnSubmit(A)
        ctx.SubmitChanges()
    Catch ex As Exception
    End Try
End Sub


Finally, I am trying to get some response from server using the following code (not receiving anything):

while (client.connected()) {
  while (client.available()) {
   buffer[counter++] = client.read();
  }
}


Explained that, I have two questions:


What am I doing wrong?
How could I debug this?
Using 

byte server[] = {XX, XX, XX, XX}; //IP
if (client.connect(server,80)) {


instead of

if (client.connect("mysite.com.br",80)) {


worked