title: First JSP + Glassfish app
body: <p>I'm very beginner, I tried to make JSP application HelloWorld, very simple like on the youtube video here <a href="http://www.youtube.com/watch?v=m_33ZHYCjf8&amp;feature=related" rel="nofollow">http://www.youtube.com/watch?v=m_33ZHYCjf8&amp;feature=related</a>, without changing almost anything </p>
  
  <p>But on my computer I can't even start this simple HelloWorld application getting the error "Not found: The requested URL /HelloWorld/ was not found on this server"</p>
  
  <p>I use Windows 7, Netbeans 6.9.1 and Glassfish v.3.</p>
  
  <p>In WEB-INF directory I have only sun-web.xml like this:</p>
  
  <pre><code>&lt;sun-web-app error-url=""&gt;
    &lt;context-root&gt;/HelloWorld&lt;/context-root&gt;
    &lt;class-loader delegate="true"/&gt;
    &lt;jsp-config&gt;
      &lt;property name="keepgenerated" value="true"&gt;
        &lt;description&gt;Keep a copy of the generated servlet class' java code.&lt;/description&gt;
      &lt;/property&gt;
    &lt;/jsp-config&gt;
  &lt;/sun-web-app&gt;
  </code></pre>
  
  <p>Please, can you direct me, what with this problem could be connected and what I can check, all the answers will be appreciated.</p>