Call to undefined method Uni_Fileuploader_Helper_Data::getProductAttachments()

I am having the following error while trying to display product attachment:

Call to undefined method Uni_Fileuploader_Helper_Data::getProductAttachments() in www\app\design\frontend\my_theme\default\template\catalog\product\list.phtml on line 51

The way I'm calling the method is:

<?php $attachments = Mage::helper('fileuploader')->getProductAttachments($_product->getId(), 1);
if (count($attachments) > 0): ?>
    <?php foreach ($attachments as $_attachment): ?>
        <?php echo $_attachment['file']; ?>
    <?php endforeach; ?>
<?php endif; ?>

Please help!

Thanks

via Chebli Mohamed