I have been trying to get my node--product-display.tpl.php file working for about 90 mins and I have no idea why it doesn't display.

My theme is called wholebox - which uses omega kickstart as a base - so I put the template into /wholebox/templates/, cleared the cache and nothing happened. I also renamed it node--productdisplay.tpl.php and node--product_display.tpl.php to be sure, cleared the cache and still nothing. It does have content in it - it's not a blank file.