title: Authentication error when connecting to specific mongodb database
body: <p>I am currently using nodejs with mongodb native driver. So my mongodb has been set with admin auth with root role, so I can log in using robomongo or command line just fine. So back to my project, I m able to connect to mongodb just fine if i set my connection string:</p>
  
  <pre><code>mongodb://admin:password@localhost:27017/
  </code></pre>
  
  <p>However, if I use this connection string:</p>
  
  <pre><code>mongodb://admin:password@localhost:27017/specificdb
  </code></pre>
  
  <p>It return as: </p>
  
  <p>MongoError: Authentication failed</p>
  
  <p>I am able to access the db using command and robomongo, is there anything I can do? I have added the admin user under the db, but still got the same problem.</p>