blank: display nothing

I've just try to install the fourish-demo but display nothing, i try to query in index.php and its display the result as below:

doc_root: /var/www/flourish-demo

In file init.php -> i change sqlite to mysql :

db = new fDatabase('mysql', 'flourish-demo', 'user', 'xxxxx');

file: index.php

$result = $db->query('describe meetups');
foreach ($result as $row) {
    echo '<pre>';print_r($row);echo '</pre>';
}

the result:

#!text/html
Array
(
    [Field] => date
    [Type] => date
    [Null] => NO
    [Key] => PRI
    [Default] => 
    [Extra] => 
) ''---------cut----------''

so what's the problem? please forward for any suggestion. thank you.