[Zope] help: can't access site w/o going through manage interface

All, I am upgrading to 2.3.1. I have built zope 2.3.1 and can access my site through the manage interface using view. But if I try to login into the site not using the manage interface (i.e. through the url) I get a zope error which basically is the result of the REQUEST['PATH_INFO'] being empty. I have a method that analyses the PATH_INFO and does different things depending on what it is set to. This method (that does the analysis) works great on the older zope and through the manage/view interface Any thoughts????? Dan