[Zope] apache authentication with proxy -- remote user mode

[zope-mailinglist]

hello all

has anybody got this working:

apache with as a proxy should do authentication
zope is in remote user mode (as described in the docs, by leaving out 
the password after the collon in the "access" file)

the apache server authenticates succesfully
and in the z2.log file i see that the remote_user variable is passed 
over, but zope always wants to switch back to normal user authentication 
and wants credentials. (btw. the user is existent in the root user folder)

is it possible, that this is a proxy problem, do i need to pass 
additional information?

tia, bernd