include_once $_SERVER['DOCUMENT_ROOT'] . '/securimage/securimage.php';
$securimage = new Securimage();
if ($securimage->check($_POST['captcha_code']) == false) {
  // the code was incorrect
  // handle the error accordingly with your other error checking

  // or you can do something really basic like this
  die('The code you entered was incorrect.  Go back and try again.');
}



<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home6/skynails/public_html/theqth/wp-content/plugins/post-from-site/post_from_site.php:14) in <b>/home6/skynails/public_html/theqth/wp-includes/pluggable.php</b> on line <b>868</b><br />