Warning: mysql_connect(): The server requested authentication method unknown to the client [mysql_old_password] in /home/euroc11/public_html/nishiusa/page.php on line 18

Warning: mysql_connect(): The server requested authentication method unknown to the client in /home/euroc11/public_html/nishiusa/page.php on line 18
I cannot connect to the database because: The server requested authentication method unknown to the client