classe a oggetti e niente output

[francy2]

class Dati extends config
{
    var $smarty;
    var $db;
    /**
     * @author francesco straffi
     * @link [url]http://www.ilsitodifrancy.altervista.org[/url]
     * @package FRANCY SYSTEM
     * @version $Id: Index.class.php,v 1.0.0 beta 2006/11/18 15:42:49 based on ADOdb engine Exp $
     * @uses Core
     * @copyright (c) francesco straffi some right reserved
     * @license [url]http://opensource.org/licenses/gpl-license.php[/url] GNU Public License 
     */
    function Dati(){
        global $userdata, $db;
        
        parent::config();
    
        include_once($this->sitedir . '/includes/php/libs/Smarty.class.php');
        include_once($this->sitedir . '/includes/php/Db/adodb.inc.php');
        include_once($this->sitedir . '/includes/php/Db/adodb-exceptions.inc.php');
        include_once($this->sitedir . '/includes/php/singleton.php');
        include_once($this->sitedir . '/includes/php/interface.php');
        
        $this->smarty = new Smarty();
        /**
         * @var $this->smarty Smarty
         */
        $ADODB_CACHE_DIR = $this->sitedir . '/cache/database';
        $this->db = NewADOConnection('mysql');
        /**
         * @var $this->db ADODB_mysql
         */
        $this->db->Connect($this->hostname, $this->username, $this->password, $this->database);
        $this->db->fetchMode = ADODB_FETCH_ASSOC;
        $this->smarty->template_dir    = $this->sitedir.'/Theme'.'/classic'.'/templates';
        $this->smarty->compile_dir     = $this->sitedir.'/cache/template_c';
        $this->smarty->config_dir      = $this->sitedir.'/Theme'.'/classic'.'/config';
        $this->smarty->compile_check   = true;
        $this->smarty->debugging       = false;
        $this->smarty->left_delimiter  = '<!--{';
        $this->smarty->right_delimiter = '}-->';
    }
    protected function menu(){
        global $userdata, $db;
        $sql = "SELECT id, url, nome, visible
            FROM ".$this->prefix."page
            ORDER BY id    ASC
            LIMIT 0,10
            ";
        $result = $this->db->CacheExecute(3600, $sql);
        $i = 0;
        
        foreach($result as $key => $menu)
        {
            if($menu['visible'] == 1)
            {
                if(preg_match('/http:\/\/.*?/is', $menu['url']))
                {
                    $men[$i++] = $menu;
                } else {
                    $men[$i++]          = $menu;
                    $men[$i - 1]['int'] = true;
                }
            }
        }

        return $men ;
    }
    
    function switch_page($center, $header = true, $footer=true){
        global $userdata, $db;
        if(!isset($center['page'])||empty($center['page'])){
            $pagename = $p = 'main';
        } else {
            $pagename = $p = $center['page'];
        }
        if(!file_exists($this->sitedir.'/page/'.$p.'.php'))
        {
            $pagename = $p = 'error';
        }
        include_once($this->sitedir.'/page/'.$p.'.php');
        
        $class = 'page_'.$p;
        
        $page = new $class();
        
        $var = $page->page();
        $var['basedir']   = $this->sitedir;
        $var['title']     = $this->title;
        $var['forumurl']  = $this->forumurl;
        $var['siteurl']   = $this->siteurl;
        $var['menu']      = $this->menu();
        $var['gzip']      = $this->gzcompress;
        $var['google']    = $this->google;
        $var['googlekey'] = $this->googlekey;
        $var['userdata']  = $userdata;
        $var['avatar']    = $this->vedi_avatar($userdata, 'width="100" height="100"');
        
        foreach($var as $name => $value){
            $this->smarty->assign($name, $value);
        }
        
        $ret .= "";
        if($header === true){
            $ret .= $this->smarty->fetch('header.tpl');
        }
        if(isset($_REQUEST['query'])&&!empty($_REQUEST['query'])&&isset($_REQUEST['search'])){
            try{
                $google = PluginRepository::loadPlugin('Google', $this);
                /**
                 * @var $google Google
                 */
            } catch(Exception $e) {
                    throw new Exception($e->getMessage());
                }
            $ret .= $google->_plugin();
        } else {
            $ret .= $this->smarty->fetch('page/'.$pagename.'.tpl');
        }
        if($footer === true){
            $ret .= $this->smarty->fetch('footer.tpl');
        }
        return $ret;
    }
    function  vedi_avatar($profiledata, $paramImg = "")
    {
        global $board_config;
                
        $avatar_img = '';
        if ( $profiledata['user_avatar_type'] && $profiledata['user_allowavatar'] )
        {
            switch( $profiledata['user_avatar_type'] )
            {
                case USER_AVATAR_UPLOAD:
                    $avatar_img = ( $board_config['allow_avatar_upload'] ) ? '[img]'.$this->forumurl.'/' . $board_config['avatar_path'] . '/' . $profiledata['user_avatar'] . '[/img]' : '';
                break;
                case USER_AVATAR_REMOTE:
                    $avatar_img = ( $board_config['allow_avatar_remote'] ) ? '[img]' . $profiledata['user_avatar'] . '[/img]' : '';
                break;
                case USER_AVATAR_GALLERY:
                    $avatar_img = ( $board_config['allow_avatar_local'] ) ? '[img]/forum/' . $board_config['avatar_gallery_path'] . '/' . $profiledata['user_avatar'] . '[/img]' : '';
                break;
            }
        }
    return ($avatar_img);
    }
}
?> 

ho problemi con questa classe da me creata...
non so come fare, perchè in locale funziona tutto e on-line niente???
non mi da nessun errore, ma nun funziona neanche. Insomma... non manda output, cosa che invece in locale fa...
cosa devo fare???
il sito è:
http://www.ilsitodifrancy.netsons.org.
PS: chiunque lo conoscesse, e lo usasse, mi potrebbe spiegare come inserire nel database delle tabelle??? non riesco a usare phpmyadmin, poichè quando vado a visualizzare il contenuto del db si blocca....
vi prego aiutatemi
PS: le funzioni le richiamo