php4 连 mysql5 的问题

用php4连接mysql5时，
Warning: mysql_connect() [function.mysql-connect]: Client does not support authentication protocol requested by server; consider upgrading MySQL client in

困了一天，最后还是到网上找到了解决办法：

在MYSQL Command Line Client中输入：SET PASSWORD FOR  'username'@'host' = OLD_PASSWORD('your_password');