title: no such file to load -- rcov/rcovtask issue in ruby 1.8.7
body: <p>I have setup existing project first time in my system where <code>ruby 1.8.7 and rails 2.3.8</code></p>
  
  <p>When i try to install gems using <code>rake gems:install</code></p>
  
  <p>I get error <code>no such file to load -- rcov/rcovtask</code></p>
  
  <p>What actual problem i dont know</p>
  
  <p>Have any one idea?</p>