[Zope] Help? ZGadflyDA product must be installed!

[Leonard Sitongia]

Hi,

I've just installed Zope, and when, as the user (with manager authority)
I created using the inituser account, I try to add the tutorial, I get the
message:

Error Type: Bad Request
Error Value: The ZGadflyDA product must be installed!

ZGadflyDA is in the Products list.  It's in the right directory.  Has the
same permissions as other products.

Can someone help me?
Thanks,
==Leonard