Hello,
I get same problem than Paul in #33955. Everyday my IP changes and everyday i can't access back end. I need to use the rescue mode to unlock.
I tried to follow your instructions but I could not find the "Log security exceptions" setting. Which tab iis it in?
I tried the rescue URL without /administrator but no change.
I installed Admin Tools on 3 sites with same problem except one on which I did not yet insert the download key.
Regards