From what I can see, you aren't calling the sub-fields, and you removed the "rows" and changed everything to read to "slides"... this is the code I commonly use on the sliders.
<?php
$rows = get_field('slides';
if($rows) {
foreach($rows as $row)
{
?>
<li><img src="<?=$row['image']?>" alt=""></li>
<?
}
}
?>
The area that says 'image' is replaced by the sub-field name. Also make sure that you're setting your "Return Value" on the field options to Image URL.