title: whenever i run my project, error "The requested resource is not available" occurs
body: <p>I'm following this tutorial to built a login page <a href="http://www.studytonight.com/servlet/login-system-example-in-servlet.php" rel="nofollow">(link)</a> but i'm using "postgresql" for database.</p>
  
  <p>I have only 2 columns in my table. One is <code>usr</code> and second one is <code>password</code>.
  I am using <code>Tomcat7 server</code> in <code>Eclipse IDE</code>.
  I changed <code>url, driver, database, name, password</code> only in <code>valid.java</code> page.</p>
  
  <p>Please help...</p>
  
  <p><b>Output shows like :</b><br>
  <code>HTTP Status 404 - /new/login
   type Status report
   message /new/login
   description The requested resource is not available.
   Apache Tomcat/7.0.70</code></p>