Problem mit WP-ContactForm von Ryan Duff

/*Wrapper function which calls the form.*/
function wpcf_callback( $content )
{    
 global $wpcf_strings;
 
 /* Run the input check. */
    if(wpcf_check_input()) // If the input check returns true (ie. there has been a submission & input is ok)
    {
            $recipient = get_option('wpcf_email');
            $subject = get_option('wpcf_subject');
      $encoding = get_option('blog_charset');
            $success_msg = get_option('wpcf_success_msg');
      $success_msg = stripslashes($success_msg);
          $from = get_option('admin_email');
            $name = $_POST['wpcf_your_name'];
            $email = $_POST['wpcf_email'];
            $website = $_POST['wpcf_website'];
            $msg = $_POST['wpcf_msg'];
        
            $headers = "From: $name <$email>\n";  // your email client will show the person's email address like normal
            $headers .= "Content-Type: text/plain; $encoding\n"; // sets the mime type
        
            $fullmsg = "$name wrote:\n";
            $fullmsg .= $msg . "\n\n";
            $fullmsg .= "Website: " . $website . "\n";
            $fullmsg .= "IP: " . getip();
        
            mail($recipient, $subject, $fullmsg, $headers, "-f $from");
        
            $results = '<div style="font-weight: bold;">' . $success_msg . '</div>';
            echo $results;
    }
    else // Else show the form. If there are errors the strings will have updated during running the inputcheck.
    {
        $form = '<div class="contactform">
        ' . $wpcf_strings['error'] . '
         <form action="' . get_permalink() . '" method="post" name="form">
          <div class="contactleft"><label for="wpcf_your_name">' . __('Your Name: ', 'wpcf') . '</label></div>' . $wpcf_strings['name']  . '
          <div class="contactleft"><label for="wpcf_email">' . __('Your Email:', 'wpcf') . '</label></div>' . $wpcf_strings['email'] . '
          <div class="contactleft"><label for="wpcf_website">' . __('Your Website:', 'wpcf') . '</label></div><div class="contactright"><input type="text" name="wpcf_website" id="wpcf_website" size="30" maxlength="100" value="' . $_POST['wpcf_website'] . '" /></div>
             <div class="contactleft"><label for="message">' . __('Your Message: ', 'wpcf') . '</label></div>' . $wpcf_strings['msg'] . '
             <div class="contactright"><input type="submit" name="Submit" value="Submit" /><input type="hidden" name="wpcf_stage" value="process" /></div>
         </form>
        </div>
        <div style="clear:both; height:1px;">&nbsp;</div>';
        return preg_replace('|<!--contact form-->|', $form, $content); 
    }
}