谷歌Captcha在注册表格verify.php问题

我在网站注册表中使用了谷歌captcha作为谷歌示例：

  <form method="post" action="htt://mysite/folder/verify.php">
    <?php
      require_once('htt://mysite/folder/recaptchalib.php');
      $publickey = "your_public_key"; // you got this from the signup page
      echo recaptcha_get_html($publickey);
    ?>
    <input type="submit" />
  </form>
  <!-- more of your HTML content -->
</body>

在verify.php中，此代码为

<?php
require_once('htt://mysite/folder/recaptchalib.php');
$privatekey = "your_private_key";
$resp = recaptcha_check_answer ($privatekey,
                            $_SERVER["REMOTE_ADDR"],
                            $_POST["recaptcha_challenge_field"],
                            $_POST["recaptcha_response_field"]);
if (!$resp->is_valid) {
// What happens when the CAPTCHA was entered incorrectly
die ("The reCAPTCHA wasn't entered correctly. Go back and try it again." .
     "(reCAPTCHA said: " . $resp->error . ")");
} else {
// Your code here to handle a successful verification
}
?>

一切都很好，captcha会找到正确/错误的captcha组合，但当我点击提交按钮时，它会显示一个带有URL的空白页面htt://mysite/folder/very.php它应该继续进行电子邮件验证，但它没有。。