[Zope] URL Pathing.

hi, If I have http://www.foo.com/ShoppingCart/addItem and it returns: container.aq_parrent.myZPT(REQUEST=REQUEST) I end up with the URL: http://www.foo.com/ShoppingCart/myZPT even though myZPT exists in the parent folder (http://www.foo.com/myZPT). My problem is if people keep adding things to the cart I end up with www.foo.com/ShoppingCart/ShoppingCart/myZPT. I don't want that. It keeps recursing and getting longer. Show how can I return a ZPT object and hot have the URL be nonsensical? Must I do a redirection? Why can't I just return? Thanks, Jason.