Plesk API and cURL doesnt work

I have a script wich uses the Plesk API to create FTP accounts. The script worked perfectly untill we moved to new VPS at a new provider.

The script doesnt work anymore and I get an error like this:

cURL error number:7 cURL error:Failed to connect to xx.xx.xxx.xxx permission denied.

It seems that cURL doesnt work. What i’ve tried is changing the php support from fastCGI to Apache module in PLESK and the error message is gone but the PLESK API does nothing though the load time of the page is much longer then when I’m using fastCGI so it looks like it does something.

I also added port 8443 to the firewall for incoming and outgoing.

I’m using PLESK 11 and my script looks like this.

// Plesk login gegevens
$host   = "**********";
$login  = "**********";
$pass   = "**********";
$port   = 8443;


// Maak de FTP map aan
$data =<<<EOF
<packet version="1.6.3.5">
<ftp-user>
<add>
<name>John</name>
<password>Doe1234</password>
<home>/private/John_Doe/</home>
<create-non-existent>true</create-non-existent>
<webspace-id>1</webspace-id>
</add>
</ftp-user>
</packet>

EOF;

sendCommand($data, $login, $pass, $host, $port);

function write_callback($ch, $data) 
{
    // echo $data;
    return strlen($data);
}

function sendCommand($data, $login, $passwd, $host, $port=8443) 
{
    echo $data;

    $script = "enterprise/control/agent.php";
    $url = "https://$host:$port/$script";
    $headers = array(
    "HTTP_AUTH_LOGIN: $login",
    "HTTP_AUTH_PASSWD: $passwd",
    "HTTP_PRETTY_PRINT: TRUE",
    "Content-Type: text/xml",
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, &$headers);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_WRITEFUNCTION, 'write_callback');
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_VERBOSE, 1);
    $result = curl_exec($ch);

    if (!$result) 
    {
         echo "nn-------------------------ncURL error number:".curl_errno($ch);
         echo "nncURL error:".curl_error($ch);
    }

    curl_close($ch);
    return;
}