Cann't connect zope server

[steve]

Can I ask question about zope here?

I started Zserver but could not connect to it using firefox.The runzope
gave message:

/usr/bin/zope/instance/bin/runzope -X debug-mode=on
2006-10-31 12:50:45 INFO ZServer HTTP server started at Tue Oct 31
12:50:45 2006
        Hostname: 0.0.0.0
        Port: 8080
2006-10-31 12:50:45 CRITICAL Zope A user was not specified to setuid
to; fix this to start as root (change the effective-user directive in
zope.conf)
Traceback (most recent call last):
  File "/usr/bin/zope/lib/python/Zope2/Startup/run.py", line 56, in ?
    run()
  File "/usr/bin/zope/lib/python/Zope2/Startup/run.py", line 21, in run
    starter.prepare()
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 98,
in prepare
    self.dropPrivileges()
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 234,
in dropPrivileges
    return dropPrivileges(self.cfg)
  File "/usr/bin/zope/lib/python/Zope2/Startup/__init__.py", line 403,
in dropPrivileges
    raise ZConfig.ConfigurationError(msg)
ZConfig.ConfigurationError: A user was not specified to setuid to; fix
this to start as root (change the effective-user directive in
zope.conf)

I configured Username:root;How to setuid?etc.