Redirecting in JSP

Hi all,
I have a file named session.jsp which i use to check the session value. If a session value is null, i want to redirect the user to login page. The Code for session.jsp is as:
<%
if((session.getValue("name") == null))
{ %>
<jsp:forward page ="index.jsp" />
<% } %>
Now I include this file in a new jsp file named xyz.jsp. Now i access xyz.jsp without logging in. So the session contains null in name variable (I have printed this value too and it contains null). But I am not redirected to index.jsp. I also tried using response.sendRedirect("index.jsp") but i m not redirected.
I am using Tomcat server
Secondly, I have a file named header.jsp Now whenever i change this file, i have to once again save all the files which use header.jsp ( i use include directive). Is there some method of avoiding this.
Thanks
Gagan Arora

Hi,
Instead of
if((session.getValue("name") == null))
try
if((session.getAttribute("name") == null))
nurettinThanks for ur support but even this doesnt works. I now recieve a Error message :500
IOExecption: Attemp to clear a buffer thats already been flushed

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