Warning: mysql_connect(): The server requested authentication method unknown to the client [mysql_old_password] in /home/polytech/public_html/admin/includes/db_connect.php on line 2

Warning: mysql_connect(): The server requested authentication method unknown to the client in /home/polytech/public_html/admin/includes/db_connect.php on line 2

Warning: mysql_select_db() expects parameter 2 to be resource, boolean given in /home/polytech/public_html/admin/includes/db_connect.php on line 3
I cant select database