Installation of QtRuby

Sorry,if this subject is revealed before,but i can’t find it.
So, i desided to learn a Ruby language with a “Ruby programming
language” book. It’s a good book, but it hasn’t any example of GUI
library. I want to write the FTP manager, so i need GUI. I found some
good libreries, and i chose QtRuby. Problem appeared, when i saw that
site doesn’t work. I found one version of
qtruby,but i had a lot of problems with it,and it doesn’t work. My OS is
Windows 7 and i have Ruby 2.0.0. So give me please correct version of
qtruby for my Ruby. And give me please step by step algorithm of
installation of Qt on Windows OS for using with Ruby.