There is a bug, in ubb_lib.cgi's portion (only in the code you pasted from this mod's instructions) find check_explicit and replace it with check_explicit2...
also in ubb_forum_summary.cgi find:
Code
$ThisHTML .= &PageBottom;
add above:
Code
$ThisHTML .="<prives$priv></prives>";
that's INSTEAD of adding that code after $ThisHTML .= $Footer.
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