How to view Secured page using J_Security_Check ?

Question

Dear Everyone,
In the web application, i am using Form based authentication for security...
i have configured exactly by giving login page and error page..
i have also configured <security constraint> , < login -config>...
But i receive error page while i give username and password....
Please give ur suggestions.. i will show u my code..
<security-constraint>
      <web-resource-collection>
          <web-resource-name>Protected Area</web-resource-name>
              <!-- Define the context-relative URL(s) to be protected -->
              <url-pattern>/jack.jsp</url-pattern>
              <http-method>GET</http-method>
              <http-method>POST</http-method> 
      </web-resource-collection>
<auth-constraint>
      <role-name>user</role-name>
</auth-constraint>     
</security-constraint>
      <login-config>
      <auth-method>FORM</auth-method>
      <realm-name>Example Form-Based Authentication Area</realm-name>
      <form-login-config>
      <form-login-page>/index.jsp</form-login-page>
      <form-error-page>/error.jsp</form-error-page>
      </form-login-config>
      </login-config>
   <security-role>
        <description>user</description>
        <role-name>user</role-name>
  </security-role>   

Answer 1

Reply to m00dy
Thank u for ur suggestions...
Every thing had been correct.., but still not working and i am receiving error page..
please give ur suggestiopns
the code is
<table border="0" cellspacing="5">
    <tr>
      <th align="right">Username:</th>
      <td align="left"><input type="text" name="j_username"></td>
    </tr>
    <tr>
      <th align="right">Password:</th>
      <td align="left"><input type="password" name="j_password"></td>
    </tr>
    <tr>
      <td align="right"><input type="submit" value="Login"></td>
      <td align="left"><input type="reset"></td>
    </tr>
  </table>