title: Cant install watir-webdriver on windows 7
body: <p>Hello i'am trying to install watir-webdriver on Windows 7 with Ruby 1.9.3 and installation hang on this:</p>
  
  <p>building native extensions. This could take a while...</p>
  
  <p>and i'am waiting
  and i'am waiting
  and i'am waiting</p>
  
  <p>and nothing goes forward. Can you give me what i'am doing wrong.</p>
  
  <p>Previously i'am installed Ruby 1.9.3, updated gems, installed devkit.</p>
  
  <p>Thanks for future help.</p>