Error 405 in the pre-approval of PagSeguro

For a long time I've been having a problem with PagSeguro which is giving me a lot of headaches.

I am making a transparent subscription to PagSeguro, and in the last step, I need to join the previously created plan. Anyway, I need to pass an XML per POST to a URL of them and receive a JSON. The problem is exactly there, because I'm setting up my XML, apparently all right, I do the POST in the same way as it is in several places suggested by PagSeguro, but I always get the error 405.

Has anyone ever had this problem and can you help me?

It follows both the XML generated in PHP and the code in which I do the entire POST operation.

XML:

<?xml version="1.0"?>
<directPreApproval>
    <plan>VALOR AQUI</plan>
    <reference>VALOR AQUI</reference>
    <sender>
        <name>VALOR AQUI</name>
        <email>VALOR AQUI</email>
        <hash>VALOR AQUI</hash>
        <phone>
            <areaCode>35</areaCode>
            <number>988029321</number>
        </phone>
        <address>
            <street>VALOR AQUI</street>
            <number>VALOR AQUI</number>
            <complement>VALOR AQUI</complement>
            <district>VALOR AQUI</district>
            <city>VALOR AQUI</city>
            <state>VALOR AQUI</state>
            <country>VALOR AQUI</country>
            <postalCode>VALOR AQUI</postalCode>
        </address>
        <documents>
            <document>
                <type>VALOR AQUI</type>
                <value>VALOR AQUI</value>
            </document>
        </documents>
    </sender>
    <paymentMethod>
        <type>VALOR AQUI</type>
        <creditCard>
            <token>VALOR AQUI</token>
            <holder>
                <name>VALOR AQUI</name>
                <birthDate>VALOR AQUI</birthDate>
                <document>
                    <type>VALOR AQUI</type>
                    <value>VALOR AQUI</value>
                </document>
                <phone>
                    <areaCode>VALOR AQUI</areaCode>
                    <number>VALOR AQUI</number>
                </phone>
                <address>
                    <street>VALOR AQUI</street>
                    <number>VALOR AQUI</number>
                    <complement>VALOR AQUI</complement>
                    <district>VALOR AQUI</district>
                    <city>VALOR AQUI</city>
                    <state>VALOR AQUI</state>
                    <country>VALOR AQUI</country>
                    <postalCode>VALOR AQUI</postalCode>
                </address>
            </holder>
        </creditCard>
    </paymentMethod>
<directPreApproval>

PHP:

$xml = "TODO O XML QUE COLOQUEI ACIMA";
$xml = str_replace("\n", '', $xml);
$xml = str_replace("\r",'',$xml);
$xml = str_replace("\t",'',$xml);

print_r($xml."\n\n");

$curl = curl_init($this->url_adesao."?email=".$this->email."&token=".$this->token);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, Array('Content-Type: application/xml;charset=ISO-8859-1','Accept: application/vnd.pagseguro.com.br.v3+xml;charset=ISO-8859-1'));
curl_setopt($curl, CURLOPT_POSTFIELDS, $xml);
$xml= curl_exec($curl);

if($xml == 'Unauthorized'){
   // header('Location: paginaDeErro.php');
    echo 'Unauthorized';
    exit;
}

curl_close($curl);

print_r($xml);
$xml = simplexml_load_string($xml);

if(count($xml->error) > 0)
{
    print_r($xml->error).'<br>';
    exit;
}

return $xml;