Unable to forward page to login.jsp

[Maria Peter]

Gurus Please help me.
I have a jsp (test.jsp) which contains
<%@ include file="/jsp/header.jsp" %>
header.jsp contains banner page, import java packages etc.
In my test.jsp I am trying validate the page for a session
If user is not logged in then i am trying to redirect the page to login.jsp
Now the problem is i tried to use
<jsp:forward page="/jsp/login.jsp">
<jsp aram name="param1" value="value2"/>
</jsp:forward>

it din't work
Then I also tried
response.sendRedirect("/jsp/login.jsp");

even this one didn't seem to work. Nothing happens in the page except
it displays the banner
Do you think is it because include file?
Thanks in advance I really appreciate your help
Maria

[Tim Baker]

yes if your include is writting out some data then a redirect won't work. Your redirect needs to be before anything is written out.

[Maria Peter]

Thank you so mcuh for your help.
I just put my session tracking code in header.jsp file
and redirect is working fine.
But I am not able to successfully able to pass the session
First I login through login.jsp -> it takes me to
TestServlet, I retrive some data from the database and dispaly it back in test.jsp
Update button in test.jsp screen takes me back to TestServlet and from the TestServlet
it forwards(Request Dispatcher) request to update.jsp
test.jsp -> TestServlet -> test.jsp -> TestServlet -> update.jsp -> TestServlet ->test.jsp
session is available till update.jsp after that i get null for the seeion value
I am using
SessionCalss sess = (SessionClass) session.getAttribute ("INFO");

and i also tried to use hidden field for session in jsp and retrive the value in servlet using
rea.getParameter but the result is same
I am not able to understand why i am able to get the session after update.jsp?
Am I doing any thing wrong? Is there any better way to achieve the same

Thanks in advance