stuck on making a server after making the folder

Hello this is following the ruby on rails project to make a "facebook" style website. I am having this same issue with following the tutorial that i posted in earlier . I believe it is cause he is using a Mac vs a windows application. As i read down below It stated how to make a dir projects by doing mkdir [directory_name] so i just wrote in mkdir projects. that sloved that issue. took me a bit to figure out how to get myself into the projects folder which i finally remembered was cd projects. Anyways i was finally thinking i had it figured out, now my command prompts says start command Prompt with ruby in the title area. but now i'm having the issue of it showing me errors when I go to make the server. I typed in rails new treebook and it throws back

ruby 1.9.3p545 (2014-02-24) [i386-mingw32]

rails new treebook C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in to_specs': Co uld not find railties (>= 0) amongst [bigdecimal-1.1.0, io-console-0.3, json-1.5 .5, minitest-2.5.1, rake-0.9.2.2, rdoc-3.9.5] (Gem::LoadError) from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in to_spec' from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems.rb:1231:in gem' from C:/RailsInstaller/Ruby1.9.3/bin/rails:22:in'

so this is where i am stuck