Ruby on Rails, could not find a valid gem 'rails'

Question

I installed ruby and updated ruby gems, now I want to download rails 3.2.13. I write gem install rails -v 3.2.13 (I need this version) I have this error

ERROR:         


        

Answer 1

do this:

gem sources -a http://rubygems.org

then answer y for

Do you want to add this insecure source? [yn]

lastly,

gem install rails

hope that helps :)