Just as a test (yes I know PS v3 is supported) can you try to start PowerShell in v2 mode by doing
C:\> powershell.exe -version 2
and then load the PowerCLI pssnapin and try to run your script ?
Just as a test (yes I know PS v3 is supported) can you try to start PowerShell in v2 mode by doing
C:\> powershell.exe -version 2
and then load the PowerCLI pssnapin and try to run your script ?