Would you know off-hand where cp2_forumedit.pl & cp2_forums2.cgi are located? They're not in the cgi-bin like everything else.
cp2_forumedit.pl is in the noncgi/templates folder
cp2_forums2.cgi not sure there is a cp2_forums.pl in the noncgi/templates folder.
That might be it.
I am looking at v6.7.2 and like I said before some files have changed. So you would open the file and see if you have similar content to find and replace.