[Zope] Man have I got a problem.....

I'm a "newbie" to zope and so far I got the zserver running and supposedly have mod_rewrite in my apache server (generic one that comes with RH7.1) but everytime I try to log into the Zope Management Interface using the default admin login/password - authentication fails.... I cant get in to configure and I dont have a clue as to why? Any help would be appreciated.... WPH