Create a child or subdomain in a field or domain

I am trying to create a child or subdomain in a field or domain in Windows Server 2008 R2 SP1.

ps>powershell.exe -noprofile -command "&{ start-process powershell -ArgumentList '-noprofile -file C:\Users\Administrator\Documents\Powershell\psfile.ps1' -verb RunAs}"

psfile.ps1

([WMIClass]"\\sandpit\root\MicrosoftDNS:MicrosoftDNS_Zone").CreateZone("subdomain.domain.com", 0, $False)