Your paths to the images are messed up.
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Is not a valid URL and does not point to an image file (.gif, .jpg etc.)
Actually, playing around with the URL some I can't find the image at all.
Follow Graham's suggestion and get into your site's image folder and make sure that the images are actually there and will actually show when you enter the URL for them in your browser. Once that's established, you need to find where the image properties are determined in your PHP code. I note that many other images not associated with products are showing fine, so presumably your problem is in the PHP code for view_item.php
I am semi-good with PHP; feel free to PM me if you need some additional help.