title: RVM won't install Rails to system
body: <p>I've tried the following commands:</p>
  
  <pre><code>rvm system gem install rails
  rvm system install rails
  rvmsudo gem install rails
  sudo gem install rails
  </code></pre>
  
  <p>After one of these commands, I get a message telling me to run <code>sudo gem install rails</code>. But it doesn't work.</p>
  
  <p>I had no problems before to install rails on rvm 1.9.2 the Mac OSX 10.6.8 version.</p>
  
  <p><strong>Could anyone help me with that?</strong></p>