I can&#39;t get my site to use gzip compression.

I recently watched this [video][1] by Chris Coyier over at css-tricks.com. In the video, he talks about enabling gzip compression to make websites run faster. 

As per his instruction, I linked through to github via html5boilerplate.com, copied the gzip compression code from their .htaccess file, pasted it into my own, and uploaded it to my site.

I&#39;ve tested it via gzipwtf.com and it doesn&#39;t seem to work. Can anyone help me with this?

My .htaccess file looks like this:

    # ----------------------------------------------------------------------
    # Trim www
    # ----------------------------------------------------------------------
    
    RewriteEngine On
    RewriteCond %{HTTP_HOST} !^orbitprint.com$ [NC]
    RewriteRule ^(.*)$ http://orbitprint.com/$1 [L,R=301]
    
    # ----------------------------------------------------------------------
    # Gzip compression
    # ----------------------------------------------------------------------
    
    &lt;IfModule mod_deflate.c&gt;
    
      # Force deflate for mangled headers developer.yahoo.com/blogs/ydn/posts/2010/12/pushing-beyond-gzipping/
      &lt;IfModule mod_setenvif.c&gt;
        &lt;IfModule mod_headers.c&gt;
          SetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\s*,?\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding
          RequestHeader append Accept-Encoding &quot;gzip,deflate&quot; env=HAVE_Accept-Encoding
        &lt;/IfModule&gt;
      &lt;/IfModule&gt;
    
      # Compress all output labeled with one of the following MIME-types
      &lt;IfModule mod_filter.c&gt;
        AddOutputFilterByType DEFLATE application/atom+xml \
                                      application/javascript \
                                      application/json \
                                      application/rss+xml \
                                      application/vnd.ms-fontobject \
                                      application/x-font-ttf \
                                      application/xhtml+xml \
                                      application/xml \
                                      font/opentype \
                                      image/svg+xml \
                                      image/x-icon \
                                      text/css \
                                      text/html \
                                      text/plain \
                                      text/x-component \
                                      text/xml
      &lt;/IfModule&gt;
    
    &lt;/IfModule&gt;


  [1]: http://css-tricks.com/video-screencasts/114-lets-do-simple-stuff-to-make-our-websites-faster/

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