title: vs2012 web essentials won't auto compile less files on save
body: <p>I'm using Web Essentials 2012 version 1.8.5 , 
  for some reason it won't auto compile less files to CSS.
  when I hit the save after I've made some changes to the less files I can see "web essentials compiling file.less" on the status line for a split of a second but nothing really happen. eg. the fils.css is not really changing.</p>
  
  <p>Did someone have the same problem? or is someone knows how to solve this problem?</p>
  
  <p>Thank you.</p>
  
  <p>p.s
  I did try the uninstall/install</p>