Runtime Error in asp.net (urgent)

一只优雅的猪

我已经在web.config里这样写了

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>

但当我upload我的asp.net application上网时，还是出现

注：我把我的全部files都放在 wwwroot/demo/ 里面，这样是出问题的原因吗？

Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".