无法编辑AD组策略，事件日志中Userrenv报错。

jtc

我想打开AD的组策略，弹出错误框：“未能打开组策略对象。您可能没有合适的权限。详细信息：参数不正确。”

以下是事件日志：
Event Type:        Error
Event Source:        Userenv
Event Category:        None
Event ID:        1030
Date:                2007-6-28
Time:                15:43:40
User:                DIJIA\administrator
Computer:        SERVER1
Description:
Windows cannot query for the list of Group Policy objects. Check the event log for possible messages previously logged by the policy engine that describes the reason for this.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

AD为WINDOWS2003，有两台域控制器。请高手指教，谢谢。