Amaya: "cannot save": why not?

I'm trying to use Amaya with Zope (http://www.zope.org/).

I can edit pages, but when I try to create a new
one, Amaya says "cannot save". That's all.
No HTTP error code, no page.

Is there any other diagnostic info I can get from Amaya?

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/