WMI Monitor Setup Error

I have a W2003 SP1 server setup as a Windows 2003 monitor using WMI - all OK - CPU, Memory and Disk reporting every 5 minutes.

Today I tried to setup teh server as a Windows Performance Counters monitor.
I used a local administrator account for the username and password.

The monitor is created OK - but when I click Add Attributes and error is returned
"There are no WMI Performance Counter Classes in the Host, subclassing Win32_PerfFormattedData"

Oh my. I stopped and started WMI using 'net stop winmgmt' and ''net start winmgmt' but the same result. The stop and start seem normal.

:-(

I'm stuck. My googles are fruitless.

Any suggestions gladly received.

thanks, Lerwick