Show errors in backoffice modules - 1.4.9

[techgin]

Hi,

 

I`m creating new payment gateway module for older 1.4.9 prestashop version.

I want to know how to show errors in backoffice modules, becouse, at this moment, when I turn on:

//in config.inc.php
@ini_set('display_errors', 'on');
define('_PS_DEBUG_SQL_', true);

//in defines.inc.php
define('_PS_MODE_DEV_', true);
define('_PS_MODE_DEMO_', true);

there is nothing to show in modules (look in attached picture)

 

Edited October 20, 2014 by techgin (see edit history)

[techgin]

Anyone ?