product image not showing in admin but not in shop

Hi,

I'm having problems getting the product images to show on this site.
At this stage the only product image is at
Resources>hypnotherapy cds>cds for adults>blissful relaxation (here)
The image is called test.jpg and is a small file, so that shouldn't be causing a problem.
I uploaded the image through the admin, and it shows when I preview the product within the admin. It doesn't show in either the product listing or the product view on the shop.
I know the space where the images show within the product listing is very small and I tried increasing the size from the stylesheet but that makes no difference to the image display problem either.:dontgetit
Any ideas where I should check to get it showing?
Thanks very much for your help.