title: problem on setting up ruby on rails
body: <p>I just started learning ruby on rails with "Lynda Ruby on Rails 3 Essential Training".</p>
  
  <p>I finished the installation, and created rails application by writing- "rails new app".
  After that when I wrote - "rails server", that's what I saw:</p>
  
  <pre><code>C:\Users\Oded\sites\simple_cms&gt;rails server
  C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.6-x86-mingw32/lib/mysql2/mysql2.r
  b:2:in `require': 193: %1 is not a valid Win32 application.   - C:/Ruby192/lib/r
  uby/gems/1.9.1/gems/mysql2-0.2.6-x86-mingw32/lib/mysql2/1.9/mysql2.so (LoadError
  )
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.6-x86-mingw32/lib/my
  sql2/mysql2.rb:2:in `&lt;top (required)&gt;'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.6-x86-mingw32/lib/my
  sql2.rb:7:in `require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.6-x86-mingw32/lib/my
  sql2.rb:7:in `&lt;top (required)&gt;'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:64:in `require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:64:in `block (2 levels) in require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:62:in `each'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:62:in `block in require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:51:in `each'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runti
  me.rb:51:in `require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler.rb:11
  2:in `require'
          from C:/Users/Oded/sites/simple_cms/config/application.rb:7:in `&lt;top (re
  quired)&gt;'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.3/lib/rails/comman
  ds.rb:28:in `require'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.3/lib/rails/comman
  ds.rb:28:in `block in &lt;top (required)&gt;'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.3/lib/rails/comman
  ds.rb:27:in `tap'
          from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.3/lib/rails/comman
  ds.rb:27:in `&lt;top (required)&gt;'
          from script/rails:6:in `require'
          from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>Can you please help me find the solution?</p>
  
  <p>Happy holidays,</p>
  
  <p>Oded</p>