curl으로 htts 사이트에 로그인 시 You must pass either an object or an array with the CURLOPT_HTTPHEADER argument

<?
$url    = 'https://그누보드 제작 사이트/bbs/login_check.php';
$agent  = "Mozilla/5.0 (iPad; CPU OS 7_1_2 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Version/7.0 Mobile/11D257 Safari/9537.53";
$cookie = "cookie.txt";

$Submit['mb_id'] = "admin";
$Submit['mb_password'] = "aaa";

    $Curl = curl_init();

curl_setopt($Curl, CURLOPT_URL, $url);
curl_setopt($Curl, CURLOPT_HTTPHEADER, 1);
curl_setopt($Curl, CURLOPT_USERAGENT, $agent);
//curl_setopt($Curl, CURLOPT_SSLVERSION, 3); // SSL 버젼 (https 접속시에 필요)
curl_setopt($Curl, CURLOPT_SSL_VERIFYPEER, true); // 인증서 체크

curl_setopt($Curl, CURLOPT_COOKIEJAR, $cookie);
curl_setopt($Curl, CURLOPT_COOKIEFILE, $cookie);
curl_setopt($Curl, CURLOPT_POST, 1);
curl_setopt($Curl, CURLOPT_POSTFIELDS, $Submit);
curl_setopt($Curl, CURLOPT_RETURNTRANSFER, 1);

    $result = curl_exec($Curl);

    curl_close($Curl);


echo $result;
?>