Half-way there; trying to Add Thumbnails to Blog Pages and Category Archives

[BruceRawles]

Hi all:

I'm trying to add Thumbnails to my Blog Pages and Category Archive Pages; I found a method here:
http://www.studiopress.com/support/s...ad.php?t=19267

The proposed method works fine for archive pages like this one:
http://www.acimblog.com/category/contributors/

but apparently not for blog pages like this one:
http://www.acimblog.com/tmtt-ashland...-in-september/

Any suggestions? THANKS in advance :-) I'm using Lifestyle 4.0, and double-checked the replaced php code after editing it to make sure it was identical in both the archive.php and the page_blog.php file:

<!-- How to Add Thumbnails to Your Blog Page and Category Archive Pages
http://www.studiopress.com/support/s...ad.php?t=19267
added 23Jan2010 -->
<?php if( get_post_meta($post->ID, "thumb", true) ): ?>
<a href="<?php the_permalink() ?>" rel="bookmark"><img class="thumb" src="<?php bloginfo('template_directory'); ?>/tools/timthumb.php?src=<?php echo get_post_meta($post->ID, "thumb", $single = true); ?>&amp;h=<?php echo get_theme_mod('featured_bottom_thumb_height'); ?>&amp;w=<?php echo get_theme_mod('featured_bottom_thumb_width'); ?>&amp;zc=1" alt="<?php the_title(); ?>" /></a>
<?php else: ?>
<?php endif; ?>