No Thumbnail Images

-- url of the page with the problem -- : -- www.mcgheesminiatures.com/index.php/shop
-- HikaShop version -- : 2.3.0
-- Joomla version -- : 2.5.8
-- PHP version -- : x.x.x
-- Browser(s) name and version -- : XExplorer 11.0.9
-- Error-message(debug-mod must be tuned on) -- : Error_message

In the HikiShop interface, when I go to the products tab, I do not see the images. One thought I had falling in and out of sleep last night, is that I remember reading something about Joomla not creating thumbnails. Going through FileZilla, there are no images in any of the thumbnail folders. In my configuration, I did check "Yes" for thumbnails, "Yes" for maintain ratio, but no images were created.

Is there a way for Hiki to generate the thumbnails? I have over 14,000 product images right now.

Thanks,
Barbara