[Zope] Local Roles, User-Defined Roles

Hi, For some reason I don't appear able to create user-defined roles at all! With regard to local roles, I'm able to create them, but they don't appear to have any effect. For example, if I create a local role for pnl as manager then change the *access content information* from the acquired setting to just manager and owner (as opposed to anonymous), then try to access the page, I discover that only user webmaster, the owner, is able to access the page. Nor can I change ownership! How should I begin trouble-shooting this? TIA, BenO