PODS CMS: pods_image not the right url

<ul class="slides">
<?php $carouselPod = pods( 'success', $id);
	$minigallery = $carouselPod->field( 'gallery', false );
	foreach ($minigallery as $thumb_image): ?>
	<li>
		<?php echo pods_image ( $thumb_image, $size = 'carousel'); ?>
	</li>
	<?php endforeach; ?>
</ul>