Problems sending Nfe 4.0 to the states of SP, MT and MS

I'm having trouble sending NFe 4.0 down only to the SP, MT, and MS states. Others are shipping normally.

You're giving this section an error:

HttpWebResponse responsePost = (HttpWebResponse)httpPostConsultaNFe.GetResponse();

Here is the code that sends it:

public string RequestWebService4_0(ConfiguracaoWebService configuracaoWebService, string param, string action, X509Certificate2 certificado, int tempoLimiteSefaz)
    {
        Uri urlpost = new Uri(configuracaoWebService.CaminhoServico);
        HttpWebRequest httpPostConsultaNFe = (HttpWebRequest)HttpWebRequest.Create(urlpost);

        string postConsultaComParametros = param;
        byte[] buffer2 = Encoding.ASCII.GetBytes(postConsultaComParametros);


        httpPostConsultaNFe.CookieContainer = cookies;
        tempoLimiteSefaz = tempoLimiteSefaz * 3000;
        httpPostConsultaNFe.Timeout = tempoLimiteSefaz;
        //httpPostConsultaNFe.ContentType = configuracaoWebService.ContentType;
        httpPostConsultaNFe.Headers.Add(@"SOAP:Action");
        httpPostConsultaNFe.ContentType = "text/xml;charset=\"utf-8\"";
        httpPostConsultaNFe.Accept = "text/xml";
        httpPostConsultaNFe.Method = "POST";
        httpPostConsultaNFe.ClientCertificates.Add(certificado);

        X509Certificate serverCert = X509Certificate.CreateFromCertFile(@"C:\PCInfo\certificado.pem");
        httpPostConsultaNFe.ClientCertificates.Add(serverCert);
        httpPostConsultaNFe.ServicePoint.Expect100Continue = true;
        httpPostConsultaNFe.ProtocolVersion = HttpVersion.Version11;
        httpPostConsultaNFe.AllowWriteStreamBuffering = true;


        //if (configuracaoWebService.CaminhoServico.Contains("Autorizacao4") || configuracaoWebService.CaminhoServico.Contains("autorizacao4"))
        httpPostConsultaNFe.Headers.Add("soapaction", action);

        //ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 | SecurityProtocolType.Ssl3;
        //ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
        ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
        ServicePointManager.Expect100Continue = true;
        ServicePointManager.DefaultConnectionLimit = 9999;
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

        Stream PostData = httpPostConsultaNFe.GetRequestStream();
        PostData.Write(buffer2, 0, buffer2.Length);
        PostData.Close();

        HttpWebResponse responsePost = (HttpWebResponse)httpPostConsultaNFe.GetResponse();
        Stream istreamPost = responsePost.GetResponseStream();
        var strRespotaUrlConsultaNFe = new StreamReader(istreamPost, System.Text.Encoding.UTF8);

        return strRespotaUrlConsultaNFe.ReadToEnd();
    }