Codeigniter无法连接到firebird

I have seen and tried all the solutions in Codeigniter - multiple database connections, You have specified an invalid database connection group codeigniter error, firebird - codeigniter connection and none of them worked.

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'testing';
$db['default']['dbdriver'] = 'mysqli';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;


$db['fbird']['hostname'] = "localhost";
$db['fbird']['username'] = "SYSDBA";
$db['fbird']['password'] = "masterkey";    
$db['fbird']['database'] = "C:\waitkyl.fdb";
$db['fbird']['dbdriver'] = "firebird";

After this configuration, I call the fbird database this way:

class Fb_model extends CI_Model{

    public function __construct(){
        parent::__construct();
    }

    public function getAll(){
        $db = $this->load->database('fbird', TRUE);

        return $db->get('categories')->result();    
    }
}

And the error I get after trying output the values print_r($this->fb_model->getAll()); is:

Fatal error: Call to a member function result() on a non-object

That usually means that the table 'categories' doesn't exists..which isn't true.

So I have tried to change my configuration file into:

$db['fbird']['hostname'] = "localhost";
$db['fbird']['username'] = "SYSDBA";
$db['fbird']['password'] = "masterkey";    
$db['fbird']['database'] = "C:\waitkyl.fdb";
$db['fbird']['dbdriver'] = "firebird";
$db['fbird']['dbprefix'] = "";
$db['fbird']['pconnect'] = FALSE;
$db['fbird']['db_debug'] = TRUE;
$db['fbird']['cache_on'] = FALSE;
$db['fbird']['cachedir'] = "";
$db['fbird']['char_set'] = "utf8";
$db['fbird']['dbcollat'] = "utf8_general_ci";

And also removed from the php.ini file the ; from the following lines:

extension=php_pdo_firebird.dll
extension=php_interbase.dll

And if I refresh the page now the error I receive is:

Unable to connect to your database server using the provided settings.

Filename: C:\xampp\htdocs\projtesting\system\database\DB_driver.php

Line Number: 124

In order to see if the credentials from the database were fine I opened it on the software SQL Manager 2008 Lite for Interbase and Firebird, and it was ok. Any ideas of what's going wrong?

Solution: Codeigniter 3 (dbdriver = ibase)

$db['firebird'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'sysdba',
    'password' => 'masterkey',
    'database' => 'c:/database.GDB',
    'dbdriver' => 'ibase',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'ANSI',
    'dbcollat' => 'NONE',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);