How to Set Annotation for multiple VMS with powercli 5.1 update 1

How to Set Annotation for multiple VMS with powercli 5.1 update 1

Hi Team,

I am trying to update the annotation of all the VMS in our environment, in three fields.Application, OS and owner. I have tried the below but for some reason it doenot work can some one guide where i am going wrong.

Import-Csv "c:\temp\book.csv" | % { Set-VM $_.VMName -Description $_.Note -Confirm:$false}

In the above I have just tied to Add Note but didn't have any luck .

Thanks in advance.