Cannot Bind Argument Error Running Windows Scheduled Task

Hi Everyone, I'm running a Windows Scheduled Task with a specific service account - it's in GPO, and also has admin access on the server. I receive this error when running the task.

Cannot bind argument to parameter 'SwisConnection' because it is null.  The task runs fine under my ID.and from cmd.  Is there something I'm missing when setting up the correct security for this service account or SWISConnection?

Thanks, Denise