Laravel dosen't connect with Oracle

'oracle' => array(
       'driver' => 'oracle',
       'tns' => '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.152.189)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = orcl)))',
       //'host' => '192.168.152.189',// this is my server IP
       //'port' => '1521',
       'database' => '',
       'username' => 'ocpl',
       'password' => '123456',
       'charset' => 'AL32UTF8',
       'prefix' => '',
),

Select instance_name from v$instance;