login security include file

[Vaskin Kissoyan]

I'm trying to do a response.sendRedirect() from an include file <jsp:include> and wanted to avoid doing a directive.include (preparser),   I keep getting "Response has already been committed, be sure not to write to the OutputStream or to trigger a commit due to any other action before calling this method."   I have been very careful as to put this include at the very top of the file, and to specify autoFlush=false and flush=false on the include tag.   Again, the intention of this include file would be to be place at the top of the jsp file to secure it by redirecting to a login page if credentials in a session based UserBean do not allow access to the page for some reason.   -Vaskin