by loren_d_c » Thu Sep 04, 2014 2:20 pm
you are using custom templates, but this is not a template issue. The add to cart form is submitting it's POST data (item number, storeid, etc) to the cart (order.cgi) at the following URL:
http://www.smallbusinessforum.com/cgi-bin/sc/order.cgi
But your webserver has some kind of auto redirect set up to send URLs with the domain starting with www. to the same URL without the www., and the POST'ed data is not preserved by this redirect. So you have 2 options: 1) remove this redirect so that the form submit to the www. domain works, or 2) go to the Preferences -> Hosting Service menu in your ShopSite and remove the 'www.' from the 'Shopping Cart CGIs URL' setting (the Publish) so that the add to cart form will submit to a URL without the 'www.' and will therefore not be redirected.
Note: a separate issue entirely, but I did see a problem with your more info pages when I viewed the source, they are missing the doctype and opening html and head tags at the beginning, and missing the closing /body and /html tags at the end. Consult the designer of your custom product template to address this issue.
-Loren