[Zope] works in method but not document?

Hi All, Here's the problem... We have a sidebar component called "submenu" that calls objectIds() to get the list of object ids in the containing folder. It's included in content pages. If submenu is called on its own, objectIds works fine. If it's called from within a DTML Method, objectIds works fine. If it's called from within a DTML Document, objectIds returns None. Any ideas? Cheers, Dan