[Mtamazon] Mtamazon won't process tags within entries

I've installed MtAmazon, the process tags plugin, and bookqueue through
the MT plugin manager.  I installed in mainly so that I could display
information within entried, but no matter what I try, I cannot get this to
work.  The tags remain unprocessed.  I've added the process_tags="1" to
the 	<$MTEntryBody process_tags="1"$> tag in my main index template.  This
is the only place I've used the process tags command.

Is there someplace else I need to put it?  According to plugin manager,
all of the plugins I've installed are working properly and have found all
the cpan/perl modules they need to run - and bookqueue works perfectly.

You can see my site at http://www.punkrockboy.com/, with my most recent
failed test entry at the top.  The code I'm using to generate that entry
is

<MTAmazon process_tags="1" method="Keyword" search="cyberlaw" line="books"
lastn="3">
     <p><a title="<MTAmazonTitle>" href="<MTAmazonLink>">
     <img style="align:center;" src="<MTAmazonMediumImage>" border="0"><br
 /><span style="text-align:left"><MTAmazonTitle>
     </a><br />
     <MTAmazonReleaseDate format="%B %e, %Y"><br />
     Price: <MTAmazonSalePrice></p><br clear="all" />
 </span></MTAmazon>
 Last updated: <MTAmazonCacheDateTime>

which I copied directly from a previous post on this mailing list, and
which alledgedly works for some people.  I've entered that into the "Entry
Body" section of the "Edit entry" page.  I've tried it with and without
the process_tags="1" in the MTAmazon tag - and, of course, it's also in
the template as described above.

What's going wrong here?

Matthew


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