[Zope] Acquisition with External Methods

I'm having some trouble with calling External Methods from DTML documents. I have DTML document "Query" that defines a form with action "View". "View" is also a DTML document containing a call to an External Method: <!--#var ExtMethod --> Ext Method would like to get access to the form values passed to View, but I can't figure out how to do it. There doesn't seem to be a way for ExtMethod to acquire the values and I can't pass them as arguments. any advice? thanks -- -chad