[Zope] SiteAccess problem

[Spinwing]

Hello all

after careful reading of all the how-to on how to hide Zope behind Apache, I
was trying to apply it. I am running Zope 2.3.1b

So I have set up properly Apache 1.3.17, and placed a folder to start
testing. I add the SiteAccess, I place the parameters... pluff, Zope throws
an exception and tells me that it can't find the document.

I will recap:
say w.x.y.200 mapped to "vzope". So I add a SiteRoot object and set the base
to http://vzope.

After this, from manage I can't access the folder anymore.

Where am I making the mistake?

Thanks
Stefano