php与curl通过php代码登录网站

我收到执行成功消息，但它没有重定向到错误的网页：

Forbidden: You don't have permission to access /myaccount.php on this server.

代码：

$username ='xyz@gmail.com';
$password ='******';
$loginUrl1 ='http://www.zopnow.com/myaccount.php';
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, $loginUrl1);
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS,"email=$username&password=$password");
// to ignore all cookies using libcurl
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
$store1= curl_exec($ch);
echo "Executed Successfully with loginUrl1 ".$store1;

curl_close($ch);