初始化出错了急！！！ [复制链接]

我输入　：http://localhost/install/index.aspx　　
则提示如下：　但ＩＩＳ浏览其它网页都可以，我是下载的PageAdmin网站系统下载：http://bbs.pageadmin.net/showtopic.aspx?topicid=16这个地方的联结，是不是文件不完整呢？？　还是什么原因
Server Application Unavailable The web application you are attempting to access on this web server is currently unavailable.  Please hit the "Refresh" button in your web browser to retry your request.
Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur.