Can not connect to MySQL server

Discuz! info: Can not connect to MySQL server

Time: 2011-5-10 1:45am
Script: /Discuz_7.2_SC_GBK/en/index.php

Error: Access denied for user 'username'@'localhost' (using password: NO)
Errno.: 1045

Similar error report has been dispatched to administrator before.

我下载了一个  7.2  怎么不能运行。。出错。。。。还没有用就出错。。晕死了。。。。

'username'@'localhost' (using password: NO)
数据库没配置好，设置好你的数据库