I never though of trying to load the ONTAP toolkit even though I don't have access to any NetApp servers.
On Server 2008 R2, from a 64-bit console I'm getting:
Import-Module : Could not load file or assembly 'file:///C:\Windows\system32\WindowsPowerShell\v1.0\Modules\dataontap\D
ataONTAP.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)
At line:1 char:5
+ ipmo <<<< dataontap
+ CategoryInfo : NotSpecified: (:) [Import-Module], FileLoadException
+ FullyQualifiedErrorId : System.IO.FileLoadException,Microsoft.PowerShell.Commands.ImportModuleCommand
I'm getting the same with 32-bit...
As per the instructions, I simply copied the dataontap directory to $pshome\modules, and tried to load it.