ERROR: While executing gem

Hi! I am new on Ruby.

Trying to install Rails as described on site:

http://angrys0ul.com/blog/2007/04/25/how-to-install-ruby-on-rails-on-a-windows-pc/

I got the messages bellow. It seems like the product’s installation ran
fine and doc installation do not.

Is that true? Is Rails installed an ready to use after that?

Thanks.

C:\GERAL\Download\Ruby\rails-1.2.3>gem install rails
include-dependencies
Bulk updating Gem source index for: http://gems.rubyforge.org
Install required dependency activesupport? [Yn] Y
Install required dependency activerecord? [Yn] Y
Install required dependency actionpack? [Yn] Y
Install required dependency actionmailer? [Yn] Y
Install required dependency actionwebservice? [Yn] Y
Successfully installed rails-1.2.3
Successfully installed activesupport-1.4.2
Successfully installed activerecord-1.15.3
Successfully installed actionpack-1.13.3
Successfully installed actionmailer-1.3.3
Successfully installed actionwebservice-1.2.3
Installing ri documentation for activesupport-1.4.2…
Installing ri documentation for activerecord-1.15.3…
Installing ri documentation for actionpack-1.13.3…
Installing ri documentation for actionmailer-1.3.3…
Installing ri documentation for actionwebservice-1.2.3…
Installing RDoc documentation for activesupport-1.4.2…
Installing RDoc documentation for activerecord-1.15.3…
Installing RDoc documentation for actionpack-1.13.3…
Installing RDoc documentation for actionmailer-1.3.3…
Installing RDoc documentation for actionwebservice-1.2.3…
ERROR: While executing gem … (Gem::GemNotFoundException)
Could not find include-dependencies (> 0) in any repository