[Zope-PTK] Problem with Portal Wizard

[jdiebold@imexpert.com]

I'm a newbie, and I try making portals !

I've encountered no problem dealing with ZOPE installation.
(ZOPE 2.2.0 under Microsoft Win 98) 
No problem with PTK Installation (I've imported the good file) 
BUT, when I try to make my first portal, I get the following message :


Zope Error
Zope has encountered an error while publishing this resource. 
Error Type: Invalid Index Name
Error Value: Cannot index fields beginning with "_"

Troubleshooting Suggestions
The URL may be incorrect. 
The parameters passed to this resource may be incorrect. 
A resource that this resource relies on may be encountering an error. 
For more detailed information about the error, please refer to the HTML 
source for this page. 
If the error persists please contact the site maintainer. Thank you for 
your patience. 





        When I created the portal , I've Entered : 
                prtl as ID of the  portal
                        portal as title
                        descript as description 
                        Zope database
                           (next page)
                Generic portal Interface
                   (last page)
                ck as name
                j_diebold@yahoo.fr as mail
                192.168.0.1 as mail server
                password policy : the first one
                ck as username
                j_diebold@yahoo.fr as mail
                D J as fullname
                xx as password


I wonder, "what's wrong ?"