products saying page not found

on 1 of the sub sites of my site even though there are products added and they show up on the products page

when you actually click on any of the products, then all i get is

Not Found

Sorry we could not find that page.

i have checked the slugs and everything works up to the point of the actual product

eg.

/store/ works

/store/products/ works

/store/products/moss-agate/ does not work

i go into products, click on quick edit and it does show the product slug as moss-agate

i do a regular edit and it shows:

Permalink: http://oneofakind.thefunkybead.com/store/products/moss-agate/

its likely something to do with the fact that the categories also are not working right

http://oneofakind.thefunkybead.com/store/products/category/pendants/

does not work neither

on the main store page the category link shows the category in the list as well. so it should be valid.

any idea what would cause this?