.entry custom background image using custom fields

I was trying something like this in the loop:

<div id="content" class="narrowcolumn">
<?php query_posts('category_name=testimonial&showposts=100'); ?>

		<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
		<div class="post" id="post-<?php the_ID(); ?>">

        <div class="lead-image-wrapper">
		<h2><a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h2>

        <?php $image = get_post_meta($post->ID, 'lead_image', true); ?>
<img src='<?php echo $image; ?>' />

			<div class="entry">
				<?php the_content('<p class="serif">Read the rest of this page &raquo;</p>'); ?>

				<?php wp_link_pages(array('before' => '<p><strong>Pages:</strong> ', 'after' => '</p>', 'next_or_number' => 'number')); ?>

	<small id="comments"><?php comments_number('No Comments yet', 'One Comment', '% Comments' );?> to “<?php the_title(); ?>” <br /><a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>">View Event / Comment on Event</a></small>

			</div>
		</div>
        </div class="lead-image-wrapper">

where I would specify a custom field “lead-image”

OK, stupid me……
I just say the problem:

template looks for lead_image

custom field specified lead-image

??