For the picures, you must also modify Uploadhandler.php .
'thumbnail' => array(
'upload_dir' => '../../FRI/thumb/',
'upload_url' => '../FRI/thumb/',
I think you have to modify this, too (in Uploadhandler.php) :
function __construct($options = null, $initialize = true, $error_messages = null) {
$this->response = array();
$this->options = array(
'script_url' => $this->get_full_url().'/',
'upload_dir' => dirname($this->get_server_var('SCRIPT_FILENAME')).'/FRI/',
'upload_url' => $this->get_full_url().'/FRI/'
I'm looking why i can't use the delete function.