Call nusoap service

Hi, I call nusoap service but got this error: "no transport found, or selected transport is not yet supported!" Here is my code:

    include('../common/libs/nusoap/lib/nusoap.php');
    $client = new \MikiID\Libs\nusoap_client('https://localhost/server/miki_service1625/index.php?wsdl', true);
    $client->soap_defencoding = 'UTF-8';
    $client->decode_utf8 = FALSE;
    $err = $client->getError();
    if ($err) {
            echo '-9999 abc';
    }
    $key = 'my_key';
    $account_name = 'admin';
    $password = 'admin';
    $ip = NULL;
    $comment = NULL;
    $reference_id = NULL;
    $md5 = \md5($account_name . $password . $key . $ip . $comment. $reference_id);
    $result = $client->call('CreateAccount', array('account_name' => $account_name
                                                  ,'password' => $password
                                                  ,'ip' => $ip
                                                  ,'comment' => $comment
                                                  ,'reference_id' => $reference_id
                                                  ,'sign' => $md5));
    if ($client->fault) {
            echo '-9999h';
    } else {
            $err = $client->getError();
            //print_r($client);
            echo $err;
            if ($err) {
                    echo '-9999';
            } else {
                    echo $result;
            }
    }

Somebody help me, please!