After find missing files, my floor wont cast any shadow i'm working on this project of mine and i've moved the floor's texture files to another folder in order to organise my textures, but i forgot to pack the files into blender. i opened the file and and found the missing files,after that, i realised that my floor object is no longer casting the light/shadows as it should be! i have no idea why :S i have all the files back but i got this prob now
if just loaded your file, changed to rendered view.
result:

So there is nothing wrong with it. Maybe you checked another file?
Solution: Just download your uploaded file again and it will work! ;)