title: sass not recognised using Windows command shell
body: <p>I've installed ruby and the sass gem on a Win 7 Enterprise box. I've had issues throughout the process, and had to download the gems and install them from local to avoid other issues.</p>
  
  <pre><code>gem install --local sass-3.1.19.gem
  </code></pre>
  
  <p>I'm trying <code>sass --watch styles.sass:styles.css</code> but I get the standard sass isn't recognised error from the command line.</p>
  
  <p>I'm really new to ruby so I could well have missed a step.</p>
  
  <p>Thanks in advance</p>