AMT Firmware 5.2 Set-AmtAlarmClock Module error

When trying to set the AMT Alarm clock on a 5.2 system, using an SCCM task sequence, I receive the following error.  This task sequence works fine on AMT 6.0 and above systems.  I have been struggling with this for weeks.... please help

ComputerName     : xxxxxx
Port             : 16993
Status           : Failed
NextAlarmTime    : [Error]
PeriodicInterval : [Error]

Exception calling "Get" with "0" argument(s): "The sender was not authorized to
access the resource."
At C:\Program Files\Intel Corporation\PowerShell\Modules\IntelvPro\set-AMTAlarm
Clock.ps1:171 char:56
+         $AlarmClockService = $AlarmClockService_EPR.Get <<<< ()
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodException