esmi on "Cant access dashboard .. help !"

Try adding:

// Enable WP_DEBUG mode
define('WP_DEBUG', true);

// Enable Debug logging to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);

// Disable display of errors and warnings
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors',0);

to the bottom of your wp-config.php file - before any closing ?> tag (if such a tag exists). And ensure that you use a plain text editor to make these changes.