If your site has SiteAccess 1 objects in it, you must upgrade them. Until you do, they will be inert
Copy 'updata.py' from the 'Extensions' directory of the SiteAccess Product to the 'lib/python' directory. Run it there, then delete it.
In the Zope root folder, add an External Method with method "updata" and python file "SiteAccess.updata". Click on the "Try It" tab, then delete it.