Rehack ubb_forum_summary.cgi, cp_lib.cgi, ultimatebb.php, public_forum_summary.pl and then update chat settings in the CP.
Also upload the new ubb_chat.cgi if you didn't fix what I said before manually.
However, I've never tried it with WOL for PHP and I looked at that code only to make the current ultimatebb.php code, so the invitation feature won't work in PHP.
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