PHPNuke Atacker Bots

Have been seeing a lot of bots hitting my phpnuke sites its not clear why they are trying to load the following files since they are not used in the current version. And have never been located on my server.

The files they are atempting to post to are
logon.php
profile.php
posting.php

I have setup a autoban on these files to track the atacks here will be the results of what I find.

Its now clear what this is. This is an atack on the phpBB forum software that PHPNUKE uses problem is that this version is modified and the atack wont work on PHP NUKE. But that doesnt stop the robots atacks.

IPS of phpBB hackers

66.199.236.106 duns.dunnaonline.com <- worst abuser
213.186.116.169 utel10.in.ua
84.252.152.169 poltawa.com
75.126.18.154 server1.domishko.ru
81.177.24.80
81.177.4.43
66.230.154.154
66.230.161.122
222.33.248.126