RSOP access deny - Windows 2003

Hi all,

     I have configured a GP for System Services. I linked this GP fro a specific OU only. the system in that OU has successfulyl applied the GP settings with no errors, but when I run gpresult or RSOP.msc the error is Access denied. the actual error displayed is give below,

GPRESULT:

ERROR: Logon Failure: Uknown user name or Bad password

RSOP.msc:

Group Policy Error: You do not have permission to perform this operation

In event viewer when I run GPUPDATE the operation was succeeded;

"Security policy in the Group policy objects has been applied successfully" Event id: 1704

following this event there were 1 other error event;

"Windows couldn't log the RSoP (Resultant Set of Policies) session status. An attempt to connect to WMI failed. No more RSoP logging will be done for this application of policy." Event id: 1090

Can anyone help me to resolve this. I know I am missing on security permissions, but what is it and wht I was missing?

Regards
Hari Vidya Sankar