Show repeatable image fields

I want to show all the images that are set in the WordPress Backend. I have used the repeatable fields setting.

I thought this was correct code, but it doesn’t work:

<?php
				$repeatable_field_values = simple_fields_values("image_repeater");

				foreach ($repeatable_field_values as $value) {
					// Field slug is "image_repeater"
					$file_id = $value["image_repeater"];
					$image_info = wp_get_attachment_image_src($file_id, "full");
					$image_url = $image_info[0];

					echo $image_url;
					echo "<img src='$image_url' alt='' />";
				}

			?>

Some information about the fields, when I click in the backend on “Show custom field keys”. The following information is given:

Meta key: _simple_fields_fieldGroupID_1_fieldID_1_numInSet_0
Field slug: image_repeater

I have only multiple image fields that I want to repeat and show below each other.

Hope you can help me out.

http://ww.wp.xz.cn/extend/plugins/simple-fields/