La sesion de la web se cierra sola

   function logout() {
        global $content, $db, $nav, $sid, $client, $ss, $ubase, $config;
        if ($client['id']) {
            $hooks = check_hooks('logout');
            if ($hooks) {
                foreach($hooks as $hook) {
                    $hook_func = $hook . '_logout';
                    $hook_func();
                }
            }
            $_SESSION['uid'] = 0;
            setcookie('jcowuid', '', time() + 3600 * 24 * 365, "/");
            setcookie('jcowss', '', time() + 3600 * 24 * 365, "/");
            redirect(uhome());
        }
        redirect(uhome());
    }

$uhome = 'http://chatdelmundo.com.es';
$flvtool2Path = '/usr/bin/flvtool2';
$ffmpegPath='/usr/local/bin/ffmpeg';
$var_cache_live = 3600; // seconds
$ubase = $uhome.'/';
//$ubase = $uhome.'/';
$num_per_page = 12;
$sid = 'jcow';
$table_prefix = 'jcow_';
$timezone = -5;
$settings = array(
	'time_format' => 'g:i a',
	'date_format' => 'M jS Y',
	'date_today' => 'Hoy',
	'date_yesterday' => 'Ayer',
	'default_lang' => 'es',
	'hide_whatsnew' => 1,
	'hide_onlineuser' => 1,
	'online' => 10, // minutes
	);
$config['disable_language'] = 0;
$config['is_local'] = 1;
$config['max_upload'] = 200; // kb
$config['allowed_html_tags'] = '<ul><li><a><img><br><p><strong><em><span>';
$config['ad_right'] =