安装Discuz!EXP-3.0.0Preview-SC_GBK出错!

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Discuz! info: MySQL Query Error

Time: 2006-8-8 10:29am
Script: /discuz/index.php

SQL: SELECT * FROM cdb_settings WHERE variable NOT IN ('bbrules', 'bbrulestxt', 'maxonlines', 'welcomemsg', 'welcomemsgtxt', 'newsletter', 'creditsnotify', 'custombackup')
Error: No database selected
Errno.: 1046

An error report has been dispatched to our administrator.

好像是，没有数据吧，安装了N遍都是这样？怎么回事？