I have set up mediawiki locally, on sign-in the user is authenticated, however when navigating to any other page (my preferences, my watchlist, main page), the user is no longer logged in.  A cookie is being created and I have allowed all cookies.  My only guess is that the session is being lost somehow.  I am using the apache2 server on windows XP.  Any suggestions as to where this problem can be troubleshot from or what is going on?