So I using access database(*mdb). This my code and success to connect:
$db[\'test\'][\'hostname\'] = \'Driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\blabl
this works:
$db['access']['hostname'] = 'DNS name created by me'; // or ip address
$db['access']['username'] = '';
$db['access']['password'] = '';
$db['access']['database'] = '';
$db['access']['dbdriver'] = 'odbc';
$db['access']['dbprefix'] = '';
$db['access']['pconnect'] = FALSE;
$db['access']['db_debug'] = TRUE;
$db['access']['cache_on'] = FALSE;
$db['access']['cachedir'] = '';
$db['access']['char_set'] = 'utf8';
$db['access']['dbcollat'] = 'utf8_general_ci';
$db['access']['swap_pre'] = '';
$db['access']['autoinit'] = TRUE;
$db['access']['stricton'] = FALSE;