ppt问题，经常报错

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  点一下ppt就会出现：ADXExternalException: An error has occurred in the code of the add-in.
    
InnerException was COMException: Presentation (unknown member) : Invalid request.  Automation rights are not granted.
       在 Microsoft.Office.Interop.PowerPoint._Presentation.get_Windows()
   在 iSlideTools.Themes.Extensions.Mvx.Presenters.MetroMvxWpfViewPresenter.xP3nZtZdra(Object  , ADXPowerPointPresentationBeforeCloseEventArgs  )
   在 AddinExpress.MSO.ADXPowerPointAppEvents.DoPresentationBeforeClose(Object presentation, Boolean& cancel)