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Diskperf -Y not working

Sorry if i am repeating this question.. I tried to enable disk monitoring using Diskperf -Y (Win 2000 Sp4 Server). It did give a message : << Both Logical and Physical Disk Performance counters on this system are automatically enabled on demand. Raw counters are also enabled for IOCTL_DISK_PERFORMANCE.
>> But, even after using Diskperf -Y in my cluster server and rebooting, i could not see the "Physical Disk" counter in perfmon. Anyone faced this issue before ? What else we need to do to see this counter? I followed this article:
http://support.microsoft.com/?kbid=253251#appliesto Thanks a lot Thanks,
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