title: ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format
body: <p>I am developing a Sencha touch 2 application. I have been following the "<a href="http://www.netmagazine.com/tutorials/styling-user-interface-sencha-touch-application" rel="noreferrer">Styling the user interface of a Sencha Touch application</a>" tutorial on theming of secha touch applications.</p>
  
  <p>It requires me to install Ruby, Compass and SASS. 
  I installed Ruby using the installer from rubyinstaller.org.</p>
  
  <p>On executing the following command, I get the expected result which confirms correct installation:</p>
  
  <pre><code>C:\&gt;ruby -v
  
  ruby 1.9.3p327 (2012-11-10) [i386-mingw32]
  </code></pre>
  
  <p>Current source is up to date:</p>
  
  <pre><code>C:\&gt;gem sources
  
  ** CURRENT SOURCES **
  
  http://rubygems.org/
  </code></pre>
  
  <p>Next, since I am behind a proxy, I used the following command to install HAML/Compass:</p>
  
  <pre><code>C:\&gt;gem install -p [proxy:port] compass
  
  ERROR:  While executing gem ... (Zlib::GzipFile::Error)
  not in gzip format**
  </code></pre>
  
  <p>Can someone help me? I found solutions such as system update, gem sources update, but everything is up to date on my system.</p>
  
  <hr>
  
  <p>Edit:</p>
  
  <pre><code>C:\&gt;gem install compass
  </code></pre>
  
  <p>works perfectly fine on my private system. When I try the same command from my workplace I need to use the proxy as mentioned above and that results in an error.</p>