which version of gem do you h ave, is it the latest?

I found
http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step
gem install rails --include-dependencies

(If this command gives you an error, you do not have the latest version
of gems installed. Run "gem -v", it should be 0.8.10. If it's an
earlier version, I recommend to reinstall the newest package - see
beginning of the tutorial).