products lead to 404 page not found

I am using zc v1,3,9b on a godaddy shared hosting server. This site has been up for 3 years now and all of a sudden when you click more info on a product it won't show the product it takes me to the 404 page not found page. The site is at http://www.aeshoponline.com. The site is for the local parents to buy school uniforms. This started today I believe as parents were calling the office complaining.

Assuming you've made no changes that might cause problems, your host has done something on the server end. Ask them if they've made any changes in the last day or two.

This is the categorie
http://aeshoponline.com/index.php?main_page=index&cPath=3

Then your sub categories links do not show a path to the product id.

http://aeshoponline.com/index.php?main_page=product_info&cPath=3_15&products_id=204

The above is the path. Your links however just read

http://aeshoponline.com/index.php?main_page=product_info&cPath=3_15

http://aeshoponline.com/index.php?main_page=product_info&cPath=3_16

Which of course is not a valid link.

May be hard for anyone to troubleshoot because you did not use the template override system

You are also missing the add to cart button on those product info pages. I would replace the templates

tpl_modules_product_listing.php

and

tpl_product_info_display.php

If the problem still exists look in admin catalog > categories

This is how your product listing is linking your product info

http://aeshoponline.com/index.php?main_page=_info&cPath=3_16&products_id=97

This is the correct link Look carefully and see
http://aeshoponline.com/index.php?main_page=product_info&cPath=3_16&products_id=97

In red is missing from your links.

Replace the includes modules product_listing.php