Unable to use IIS: drive in powershell

[ryandailey21]

I get the follow error after running a command to change the physical path of the IIS site

PS C:\ASPApp> Get-IISSite

Name ID State Physical Path Bindings

---

Default Web Site 1 Started %SystemDrive%\inetpub\wwwroot http *:80:

PS C:\ASPApp> Get-IISSite Set-ItemProperty IIS:\Sites\sitea -name physicalPath -value %SystemDrive%\inetpub\wwwroot\test Get-IISSite : A positional parameter cannot be found that accepts argument 'Set-ItemProperty'. At line:1 char:1

• Get-IISSite Set-ItemProperty IIS:\Sites\sitea -name physicalPath -val ...

• 
  + CategoryInfo          : InvalidArgument: (:) [Get-IISSite], ParameterBindingException
  + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.IIS.Powershell.Commands.GetIISSiteCommand