Server Error in '/' Application.

       在本机调好的系统，放到WINDWOS 2003 IIS上，通过网页形式浏览就出错：
Server Error in '/' Application.
Runtime Error
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".

<!-- Web.Config Configuration File -->
<configuration>
    <system.web>
        <customErrors mode="Remote Olny"/>
    </system.web>
</configuration>

Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.
   想了想可能是路径问题，还是什么其他的。
  最后，，，，将web.config里的  
  <customErrors   mode="RemoteOnly"   />改成  
  <customErrors   mode="Off"   />  
  就看到了具体的错误。。。晕了半天