title: Could not find linecache19-0.5.13 in any of the sources on Windows 7 x64
body: <p>I installed Ruby, if I run</p>
  
  <pre><code>ruby -v
  </code></pre>
  
  <p>I see:</p>
  
  <pre><code>ruby 1.9.3p125 (2012-02-16) [i386-mingw32]
  </code></pre>
  
  <p>If I run in my app dir </p>
  
  <pre><code>rails server
  </code></pre>
  
  <p>output:</p>
  
  <pre><code>←[31mCould not find multi_json-1.3.2 in any of the sources←[0m
  ←[33mRun `bundle install` to install missing gems.←[0m
  </code></pre>
  
  <p>Running</p>
  
  <pre><code>bundle install
  </code></pre>
  
  <p>this error appears:</p>
  
  <pre><code>Fetching source index for http://rubygems.org/
  Could not find linecache19-0.5.13 in any of the sources
  </code></pre>
  
  <p>what's the problem?</p>