Executing (calling) powershell commands through Control-M

Hello,

I am new to usage of powershell.  I am trying to execute (call) a powershell script through the BMC Control-M batch processing program via a Command Line.

The command I am using is: powershell "D:\jobs\NOC\CallJobWithStepPPD.ps1.  The D refers to the path on a server.  The error I get when I try to execute the command is:

powershell "D:\Control-M\CallJobWithStepPPD.ps1'' 'PPD_D_FI_CCC' 'EMAIL_USERS'
File D:\Control-M\CallJobWithStepPPD.ps1 cannot be loaded because the execution
 of scripts is disabled on this system. Please see "get-help about_signing" for
 more details.
At line:1 char:38
+ D:\Control-M\CallJobWithStepPPD.ps1'' <<<<  'PPD_D_FI_CCC' 'EMAIL_USERS'
    + CategoryInfo          : NotSpecified: (:) [], PSSecurityException
    + FullyQualifiedErrorId : RuntimeException

I have verified that the ExecutionPolicy is set to Unrestricted.  Can anyone provide any guidance on what might be causing this error?  Thanks