WPAlchemy - Issue getting value pulled into page template

functions.php

<?php

// add Gallery Images custom meta box
$mgallery = new WPAlchemy_MetaBox(array
(
	'id' => '_gallery_main',
	'title' => 'Gallery Images',
	'types' => array('gallery_main'), // added only for pages
	'context' => 'normal', // same as above, defaults to "normal"
	'priority' => 'high', // same as above, defaults to "high"
	'template' => TEMPLATEPATH . '/custom/gallery_images_repeatingfields.php',
	'hide_editor' => TRUE
));

?>

gallery.php

<?php $loop = new WP_Query( array( 'post_type' => 'gallery_main', 'posts_per_page' => -1 ) );
     while ( $loop->have_posts() ) : $loop->the_post(); ?>
				  
	<div class="mgallery">
	<?php 
	    global $mgallery;
	    $mgallery->the_meta();
	?>
	    <img src="<?php $mgallery->the_value('imgurl'); ?>" />
	</div><!-- end mgallery -->
				  
     <?php endwhile; ?>

gallery_images_repeatingfields.php

<?php global $wpalchemy_media_access; ?>
<div class="my_meta_control">

	<p><a href="#" class="dodelete-docs button">Remove All</a></p>
    
    <?php while($mb->have_fields_and_multi('gallery_image')): ?>
    <?php $mb->the_group_open(); ?>
    
    	<a href="#" class="dodelete button">Remove</a> 

		<?php $mb->the_field('imgurl'); ?>
    	<?php $wpalchemy_media_access->setGroupName('n' . $mb->get_the_index())->setInsertButtonLabel('Insert Image')->setTab('type'); ?><!-- label of insert button in media uploader box -->
    
    <p>
    	<?php echo $wpalchemy_media_access->getField(array('name' => $mb->get_the_name(), 'value' => $mb->get_the_value())); ?>
        <?php echo $wpalchemy_media_access->getButton(array('label' => 'Add Image to Gallery')); ?>
    </p>
    
    <?php $mb->the_field('title');?>
    <label for="<?php $mb->the_name(); ?>">Title</label>
    <p><input type="text" id="<?php $mb->the_name(); ?>" name="<?php $mb->the_name(); ?>" value="<?php $mb->the_value(); ?>"/></p>
    
    <?php $mb->the_field('gname');?>
    <label for="<?php $mb->the_name(); ?>">Gallery Name</label>
    <p><input type="text" id="<?php $mb->the_name(); ?>" name="<?php $mb->the_name(); ?>" value="<?php $mb->the_value(); ?>"/></p>
    
    <?php $mb->the_group_close(); ?>
    <?php endwhile; ?>
    
    <p style="margin-bottom:15px; padding-top:5px;"><a href="#" class="docopy-docs button">Add</a></p>
    
</div>