[Zope] CVS PTK and IOError?

Hello. I just checked out the current version of the PTK base and Demo product from CVS. I copied the files as stated in the readme.txt, and my products appear ok (not broken). When I invoke the Wizard (Portal) and fill in the information, after submitting the final page (Finish) I get a Zope IOError. Any idea what could cause this? Cya Mario