I need to get the list of images added in a gallery

I have a custom post type named “services” and there I have a wysiwyg field (called galeria), created with the “advanced custom field” plugin.
In that field, the user adds a gallery with images.

And i have a code to get the images from that gallery to use it on different places.
What i need is to change the code a little so it works with wordpress 4.1, in other versions it used to work just fine. Now the first picture never appears.

This is the code:

<?php 

	   remove_shortcode('gallery');
	   $gallery_content = get_field('galeria', $post->ID);
	   preg_match('/\[gallery.*ids=.(.*).\]/', $gallery_content, $ids);
	   $image_ids = explode(",", $ids[1]);
	    $count = 0;
	    $max = 9999; // define how many images to show

	   foreach($image_ids as $image_id) {
	      $count++;
	      if ($count > $max) {
	       break;
	      }
	    $imagebig =  wp_get_attachment_image_src( $image_id, 'large', false, '' );
	    $imagethumb =  wp_get_attachment_image_src( $image_id, 'thumb-size', false, '' );
	    $imageslider =  wp_get_attachment_image_src( $image_id, 'slider-size', false, '' );
	    $alt = get_post_meta($image, '_wp_attachment_image_alt', true);

	     echo '<li><img src="'.$imageslider[0].'"';?> alt="" ></li>
	    <?php
	   }
	?>