[Zope] What is 'Experimental LoginManager support' in PTK?

[Dirksen]

In the 2nd step of creating a portal site, there's a
'Database' option list. One can choose 'Zope Database'
or 'Experimental LoginManager support'. If I pick the
latter, I'll end up with such error:
Error Type: NameError
Error Value: Invalid/nonexistent ZClass
'MembershipZ/LoginMember'

Does the 'experimental' mean 'unfunctional'? How can I
make it work?

Dirksen

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