FW: Error

Buenas tardes lista, me sale este error al intentar instalar rails y no
se porq.
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_re quire': no such file to load -- ./script/../config/../vendor/rails/railties/lib/ initializer (LoadError) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inre
quire’
from ./script/…/config/boot.rb:16
from
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in ge m_original_require' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inre
quire’
from script/generate:2

Alguna sugerencia?

Saludos