Basic query question with MoveNext

[delia]

This is so basic I hate to even ask but I can't see what I've done wrong.

I know the query is correct because I used it in the database so I'm missing something in the MoveNext function. It must not be as simple I want it to be.

Instead of the 4 different buttons, it gives the same button 4 times

<ul class="ceebox mixed">
<? 
  $buttons = $db->Execute("select * from " . TABLE_CATEGORY_BUTTONS . " where cat_id = '" . zen_get_products_category_id((int)$_GET['products_id']). "' ");
	  $buttonName =  $buttons->fields['name'];
      $url =  $buttons->fields['url'];
while (!$buttons->EOF) { ?>
					<li><a href="/shop/popups/<?php echo $url   ?>">
					<img width="159" height="34" border="0" src="shop/images/category_buttons/<?php echo $buttonName   ?>" /></a></li>
                    </ul>
                    <?php $buttons->MoveNext();
                    }
                    ?>