I've been having problems too. First off, there was no "lunadll.dll" file, just "lunadll.txt," second off, refer to the attached images and try to tell me if there's something wrong here. Help would be greatly appreciated.
EDIT: Wait a darn minute. I just looked into the .rar file itself, why didn't the lunadll.dll file get extracted?
EDIT 2: Nevermind, finally got it to work. But you might want to make a step-by-step tutorial if other people are not to be confused.