我可以'；t将Recaptcha嵌入电子邮件表单中

我正试图在我正在开发的网站上的电子邮件表单中实现一个重述，但它不起作用，我不知道为什么。。。我已经删除了所有的重述代码，表单运行良好，我认为我的错误在于某个地方的重述处理，但我不确定。如有任何帮助，将不胜感激

这是表格

<!-- start contact form -->
                <form method="POST" name="contact_form" action="contact-form-handler.php">
                    <h4>Your Name:</h4>
                    <input type="text" name="name" size="35">
                    <h4>Email Address:</h4>
                    <input type="text" name="email" size="35">
                    <h4>Message:</h4>
                    <textarea name="message" rows="6" cols="37"></textarea>
                    <div>
                        <script type="text/javascript" 
                                src="http://www.google.com/recaptcha/api/challenge?k=publickey">
                        </script>
                        <noscript>
                        <iframe src="http://www.google.com/recaptcha/api/noscript?k=publickey"
                                height="300" width="500" frameborder="0"></iframe><br>
                        <textarea name="recaptcha_challenge_field" rows="3" cols="40">
                        </textarea>
                        <input type="hidden" name="recaptcha_response_field"
                            value="manual_challenge">
                        </noscript>
                    </div>
                    <div>
                        <input type="submit" value="Submit">
                    </div>
                    <script language="JavaScript">
                    var frmvalidator  = new Validator("contact_form");
                    frmvalidator.addValidation("name","req","Please provide your name");
                    frmvalidator.addValidation("email","req","Please provide your email");
                    frmvalidator.addValidation("email","email","Please enter a valid email address");
                    frmvalidator.addValidation("message","req","Please write a message");   
                    frmvalidator.addValidation("recaptcha_challenge_field", "req", "Please answer the captcha test");
                    </script>
                </form>
                <!-- end contact form-->

这是处理它的后端php…

    <?php
require_once('/scripts/recaptcha/recaptchalib.php');
$privatekey = "PRIVATE KEY";
$resp = recaptcha_check_answer ($privatekey, $_SERVER["REMOTE_ADDR"], $_POST["recaptcha_challenge_field"], $_POST["recaptcha_response_field"]);
if (!$resp->is_valid) {
header('Location: contact.html')
exit;
} else {
$myemail = 'myemail';
$to = $myemail;
$email_subject = "Contact form submission: $name";
$email_body = "You have received a new message. ".
" Here are the details:'n Name: $name 'n ".
"Email: $email_address'n Message 'n $message";
$headers = "From: $myemail'n";
$headers .= "Reply-To: $email_address";
$email_body = wordwrap($email_body, 70);
mail($to,$email_subject,$email_body,$headers);
header('Location: contact_thanks.html');
exit;
}
?>