Powershell module

Hey guys! New here so I'm not sure it's the right place to post this but...

I've started using the IntelvPro Powershell module, but I can't do a simple line:

Get-AMTFirmwareVersion -ComputerName:<ComputerName>

I get the following:

ComputerName                  Property                            Value

------------                            --------                                -----

<ComputerName>              Error                                 Cannot connect

Any ideas as to why?