[求助]在配置IPB论坛时,Mysql无法连接?

crazychen

环境:
        系统:RedHatAS4.0
               apache-2.2.0  + PHP-4.4.2 +Mysql-5.0.18
        安装配置好后,一切正常,在安装IPB-2.1.2论坛后,进行配置,已顺利进入配置,在连接Mysql服务器,出现错误,如下:

  Warning!

The following errors must be rectified before continuing!
Please go back and try again!

Connection error:

Access denied for user ''@'localhost' to database 'chenpeng'

网上说把要mysql设置为使用oldpassword方式:请问如何设置呢?我是个菜鸟?