Magento, Showing Star Ratings in Custom Template - magento-1.7

Question

I've managed to show the prices for each product, but I can not show the star ratings for each product, this is a separate template file, I'm referencing the original list.phtml but something isn't right, I can only assume I'm missing something:
<div class="category-products">
<div class="products-grid">
<?php
$_helper = Mage::helper('catalog/output');
$categoryid = 26;
$category = Mage::getModel('catalog/category');
$category->load($categoryid);
$collection = $category->getProductCollection();
$collection->addAttributeToSelect('*');
foreach ($collection as $_product) {
?>
<div class="item">
<img src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(135); ?>" width="135" height="135" alt="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" />
<h2 class="product-name"><?php echo $_product->getName(); ?></h2>
<?php if($_product->getRatingSummary()): ?>
<?php echo $this->getReviewsSummaryHtml($_product, 'short') ?>
<?php endif; ?>
<?php
$product_block = new Mage_Catalog_Block_Product;
echo $product_block->getPriceHtml($_product);
?>
<div class="actions">
<?php if($_product->isSaleable()): ?>
<button type="button" title="<?php echo $this->__('Add to Cart') ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->getAddToCartUrl($_product) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button>
<?php else: ?>
<p class="availability out-of-stock"><span><?php echo $this->__('Out of stock') ?></span></p>
<?php endif; ?>
</div>
</div>
<?php } ?>
</div>
The getReviewsSummaryHtml() is not showing the stars...