why is my ssub blog uploaded imges not showing?

Hello,

I have an issue with my sub-blogs. When I upload images, the link is broken. for example http://jennyproductss.12blog.org/files/2013/01/profilegoogle.png shows 404 error. Also, all the header images on the sub-blogs do not show in browsers neither do the preview images show. I know this is not a part of your products, I know its a .htaccess error; but what is the right htaccess to use in this regard?

Thanks for your help in advance.