vRO Guest script manager Authentication errors

I am getting an error when trying to run a script through GSM. It is stating that "This operation requires an interactive win dow station" 

The script is as follows. 

Basically we are trying to mount a disk in windows to a specific drive letter and format it. 

initialize-disk [driveNumber] ; new-partition -disknumber [driveNumber] -driveletter [driveLetter] -usemaximumsize | format-volume 

Please let me know if you have any ideas to get around this. 

Thanks,
Matthew