Problems with Session.IsNewSession - Please help...

[rsouza]

Hi.

Recently here in my work we added the following code in the Global.asax
file to handled the session expired and redirect users to the home of
the site explaining them the occurred (some thing like "Your session
has expired, please restart your navigation.").

public void Session_Start(Object sender, EventArgs e) {

if(Session.IsNewSession && Request.Headers["Cookie"] != null &&
Request.Headers["Cookie"].IndexOf("ASP.NET_SessionId") >= 0)
{
Response.Redirect("/index.aspx?timeout=1");
// when the param "timeout" exists in the url the user
receives the message "... Session expired ..."
}
}

In our tests the code above works fine, but now sometimes we open the
browser, type the url address of the site and the message "... session
expired ..." appears. This occurs just in some machines and not all the
times we access the site.

Someone knows what is happening??

Thanks

Rodrigo