Powershell workflow for vm deploy

Hi All,

I am trying to create a workflow for automated deploy of vms from the below link.

http://gallery.technet.microsoft.com/scriptcenter/c74b4a23-e4ec-4829-b38e-54252b40fdec

When ever I try to run even a simple workflow workflow invoke-helloworld

, it just gives 2 arrows below and no pop up of results. like Helloworld as it should do. Please tell me how can I create a workflow for deploying vms automatically on ESX host. My manager has given me a project on server build automation. I am a server build engineer. I am not a scripting guy so I am new to this world.

Thanks