your instructions are missing something.
where it says:
PHP Code:
**********************************
OPEN Show Thread Templates : showthread
**********************************
------------------
Find
------------------
$header
------------------
REPLACE with
------------------
$header
$showthisad
**********************************
SAVE Show Thread Templates : showthread
**********************************
------------------
Add this at the bottom
------------------
$showthisad2
**********************************
SAVE header template
**********************************
i think you forgot to put
PHP Code:
**********************************
OPEN Show Thread Templates : header
**********************************
below
PHP Code:
**********************************
SAVE Show Thread Templates : showthread
**********************************