subject header change

I am running exim 4.34 with the exiscan patch.  I followed the tutorial 
linked from the exiscan site for modifying the subject in the header to 
something like ***POSSIBLE SPAM *** $h_subject.

Here are my config file excerpts...

# add a new subject line when it's over the system-wide threshold
  warn message = Subject: *** POSSIBLE SPAM *** $h_subject
       spam = nobody

# add a new subject line when it's over the system-wide threshold
  warn message = Subject: *** POSSIBLE SPAM *** $h_subject
       spam = nobody:true
       condition = ${if >{$spam_score_int}{60}{1}{0}}

The first I got from the tutorial.  This seemed logical but had no effect. I 
changed it to the second so that it would mark the subject on all messages 
scoring 6 or higher. This works ... not as dynamic but it works.  Though 
strangely it doesn't modify the subject.. it just adds a whole new line in 
the header. Now I have one line with Subject : foo and at the bottom of the 
header (Subject: ***POSSIBLE SPAM *** foo)

What am I doing wrong?

::chris

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