Maybe you are testing it on old agreed ruled forum.
Try creating a new (and temp, of course) "lol" rules on a selected forum.
Select ALL USERGROUP (just to test it) and save it.
Try opening that forum..!
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no setup needed.
When this addon is installed, the UAE hack will be applied also on forumdisplay.php, showforum.php, showpost.php, etc.. and not only in newthread.php.