[Ghost 15] Why do I need to confirm starting creating image

My Norton Ghost 15 is doing well, but the only problem I have, is that I need to confirm to start creating an image. I scheduled the job for a monthly new full backup and daily only the changes. But every I got a window which ask me yes or no to start NG15 to create an image.

 

What to do, so the image will start automatically without the asking window?