vB3 - What does it take to get the WYSIWYG editor to... ummm... work?

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Well, I am working on a shoutbox, but whenever the WYSIWYG editor is used to make a shout, the message comes up blank. I'd think that this code would be enough to make it work:

PHP Code:

        if (isset($_POST['WYSIWYG_HTML'])) {
            require_once('./includes/functions_wysiwyg.php');
            $newpost['message'] = convert_wysiwyg_html_to_bbcode($_POST['WYSIWYG_HTML']);
        } else {
            $newpost['message'] = $_POST['message'];
        } 


But that still doesn't work. Any ideas?