cpu.usage.average Not Working

[E4F]

I am not able to get CPU stats from my ESX hosts using the following command.  Has anyone seen this before.

get-vmhost -name Server101| Get-Stat -Stat cpu.usage.average -Start (Get-Date).AddHours(-168) -IntevalMins 720 -MaxSamples (14)

Here is my output

MetricId                Timestamp                          Value Unit     Instance
--------                ---------                          ----- ----     --------
cpu.usage.average       10/26/2011 8:00:00 AM                  0 %
cpu.usage.average       10/26/2011 6:00:00 AM                  0 %
cpu.usage.average       10/26/2011 4:00:00 AM                  0 %
cpu.usage.average       10/26/2011 2:00:00 AM                  0 %
cpu.usage.average       10/26/2011 12:00:00 AM                 0 %
cpu.usage.average       10/25/2011 10:00:00 PM                 0 %
cpu.usage.average       10/25/2011 8:00:00 PM                  0 %
cpu.usage.average       10/25/2011 6:00:00 PM                  0 %
cpu.usage.average       10/25/2011 4:00:00 PM                  0 %
cpu.usage.average       10/25/2011 2:00:00 PM                  0 %
cpu.usage.average       10/25/2011 12:00:00 PM                 0 %
cpu.usage.average       10/25/2011 10:00:00 AM                 0 %
cpu.usage.average       10/25/2011 8:00:00 AM                  0 %
cpu.usage.average       10/25/2011 6:00:00 AM                  0 %

[LucD]

Do you see values for this metric during that time range and for that server in the vSphere client ?

[E4F]

Yes I do

[LucD]

Do you see any values when you run it this way ?

Or does that return zeroes as well ?

get-vmhost -name Server101 | 
Get-Stat -Stat cpu.usage.average -Start (Get-Date).AddHours(-168)

[E4F]

That did it