Store Not Coming Up

Everything installed fine and was working great. Then one day i looked at the storefront and everything was gone. It wont display categories or products. If I try to view a product from the link in the admin panel it shows 404 Not Found. But all of my products are visible within the admin area, just cant view them on the store front. What change could have caused this? as all i have done was add products.



Edit:

I did re-install cscart but just does the same thing, did notice however if i use my database the store wont come up but if i use the second database i created with the demo data it works fine. What in the database could cause this?

Sorry guys i figured it out. If you ever have this problem check out your localization settings. Seems I had some bad settings in there.