You need to edit the config.php and admin/config.php. You will need to edit the following lines of code (9-18) in our example, located under // DIR:
define('DIR_APPLICATION', '/home/system username/public_html/oc1551/catalog/');
define('DIR_SYSTEM', '/home/system username/public_html/oc1551/system/');
define('DIR_DATABASE', '/home/system username/public_html/oc1551/system/database/');
define('DIR_LANGUAGE', '/home/system username/public_html/oc1551/catalog/language/');
define('DIR_TEMPLATE', '/home/system username/public_html/oc1551/catalog/view/theme/');
define('DIR_CONFIG', '/home/system username/public_html/oc1551/system/config/');
define('DIR_IMAGE', '/home/system usernamepublic_html/oc1551/image/');
define('DIR_CACHE', '/home/system username/public_html/oc1551/system/cache/');
define('DIR_DOWNLOAD', '/home/system username/public_html/oc1551/download/');
define('DIR_LOGS', '/home/stoychev/system username/oc1551/system/logs/');
Note: Please put your site Cpanel username under system username
then, You need to edit the Database entries lines (21-26)
define('DB_DRIVER', 'mysql');
define('DB_HOSTNAME', 'localhost');
define('DB_USERNAME', 'stoychev_test');
define('DB_PASSWORD', ‘123456789);
define('DB_DATABASE', 'stoychev_oc1551');
define('DB_PREFIX', 'oc_');
Please fill in your USERNAME, PASSWORD and DATABASE under the ‘DB_USERNAME’, 'DB_PASSWORD' and “DB_DATABASE’
Please read this article for more informatino. http://isenselabs.com/posts/step-by-step-opencart-migration-to-a-new-server