今天升级mysql数据库为4.1.18后出现问题，求助

今天升级mysql数据库为4.1.18后出现问题

具体是这样的

Discuz! info: Can not connect to MySQL server

Time: 2006-3-3 6:09pm
Script: /qiyu/qiyubbs/index.php

Error: Client does not support authentication protocol requested by server; consider upgrading MySQL client
Errno.: 1251

Similar error report has beed dispatched to administrator before.


网上查了下
都 是那第一说
但我看不懂，因为我对mysql不是很懂呀
一:

mysql> SET PASSWORD FOR
-> 'some_user'@'some_host' = OLD_PASSWORD('newpwd');

二:

mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd')
-> WHERE Host = 'some_host' AND User = 'some_user';
mysql> FLUSH PRIVILEGES;

这两种方法应该怎么操作呢？
希望朋友们能给我说的详细点
先谢谢了

[ 本帖最后由 qiyucsu 于 2006-3-3 20:25 编辑 ]

数据库用户名密码错误