Hovering over the WMI perfomance counter shows me the current raw value from the exchange server, however when I add the monitor and try to test it, I get  The Monitor did not respond to the test request.
The specific monitor in question is the PhysicalDisk.AvgDisksecPerRead (any instance). Is this due to the fact that it is a 2008 server. Has anyone gotten this working?

Thanks.

Rob