Comment aproval

Hello,
I have encounter a problem in my website that I do not know how to handle. I am trying to find a way to approve the comments from the people who want to post in my forum page. I have tried to mark the boxes in the permission tab, so that only the administrator and the super admin could post comments without approval. But I am not getting any notification when the anonymous and authenticated users post a comment. Does anyone know how to fix this problem?
Thank you!

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