[Zope] Problem with installation

[francesco emmi]

Hy to everyone.
I tried to install zope, but when I type " ./start" this line appear:

2002-02-22T11:21:52 INFO(0) ZODB Opening database for mounting: 
'142274768_1014376912.884291'
------
2002-02-22T11:21:52 INFO(0) ZODB Mounted database 
'142274768_1014376912.884291' at /temp_folder
------
2002-02-22T11:22:15 INFO(0) Zope New disk product detected, determining if we 
need to fix up any ZClasses.
------
2002-02-22T11:22:15 PANIC(300) z2 Startup exception
Traceback (innermost last):
  File /usr/local/src/Zope-2.5.0-src/z2.py, line 556, in ?
  File /usr/local/src/Zope-2.5.0-src/ZServer/HTTPServer.py, line 320, in 
__init__
  File /usr/local/src/Zope-2.5.0-src/ZServer/medusa/http_server.py, line 578, 
in __init__
error: host not found

I can't understand what is the problem. 
Can someone help me?
Thank you.