When U unzipped MK's did U leave all the files contained in the zip file in that folder? If not they need to be in the same folder. If U did, then perhaps it unzipped incorrectly for some reason, try installing it again.
If U have winzip on your PC, just doubleclick on the MK zip file and winzip should open automatically and then just follow the screens. If U don't have it, U can download it here