英文验证码访问变成Access Denied

英文验证码，在文件 \source\module\misc\misc_seccode.php 里面的一条代码导致我论坛验证码出现Access Denied

  if($_G['setting']['seccodedata']['type'] < 2 && ($refererhost['host'] != $_SERVER['HTTP_HOST']) || $_G['setting']['seccodedata']['type'] == 2 && !extension_loaded('ming') && $_POST['fromFlash'] != 1 || $_G['setting']['seccodedata']['type'] == 3 && $_GET['fromFlash'] != 1) {
        exit('Access Denied');
}