Commented Issue: The Windows Powershell snap-in Webadministration is not installed on this machine. [18626]

Specs:
W2K8 Server
Sharepoint 2010
June 2011 CU
SQL Server 2K8 R2
 
The autospinstaller errors out in the Creating Web Application section of the script.
 
Add-PSSnapin : The Windows PowerShell snap-in 'WebAdministration' is not installed on this machine.
At C:\SPFolder\AutoInstaller\AutoSPInstallerFunctions
Add-PSSnapin <<<< WebAdministration
InvalidArgument <WebAdministration:String> [Add -PSSnapin], PSArgumentException
+FullyQualifiedErrorId : AddPSSnapinRead,Microsoft.Powershell.Commands.AddPSSnapinCommand
 
followed by:
 
Get-ItemProperty : Cannot find drive. A drive with the name 'IIS' does not exists
 
HELP Please!!
Comments: ** Comment from web user: fangdahai **

Same issue here.