404 Error when I click a product and Not Found Requested URL when I try to add/edit

[RodG]

My problem just started today. I have been CSS coding this site... store.scubaschoolsofamerica.com I am not at the point where I want to add some more product and I am stuck. When I admin > catagories/product and add or edit a product it says, "Not Found, The requested URL /ssaadmin/class_instructional.php was not found on this server." I downloaded a new copy of the store and checked to see it there was such a file and it appears not to exist on my FTP nor in the new version i just downloaded. Also as you see when you select a product in my store it takes you to a 404 Error page. Any help would be appreciated.

class_instructional.php is NOT a standard zencart file.

What addons have you attempted to add recently? (like, just before the problem started).

My guess is that whatever addon it was, you have uploaded its files to the folder called "admin" rather than your renamed admin folder.

Cheers
Rod