[Zope] ZEO Install Problem

[Ben Ocean]

Hi;
Having unpacked the distro and following the instructions, I enter this 
command:

python lib/python/ZEO/start.py -p 8888

and get this error:

[root@hermes Zope_software_home]# Traceback (innermost last):
   File "lib/python/ZEO/start.py", line 268, in main
     import ZEO.StorageServer, asyncore
   File "lib/python/ZEO/__init__.py", line 86, in ?
     import fap
   File "lib/python/ZEO/fap.py", line 166, in ?
     fap()
   File "lib/python/ZEO/fap.py", line 127, in fap
     raise ImportError, 'Cannot import an up-to-date asyncore'
ImportError: Cannot import an up-to-date asyncore

How do I get an up-to-date asyncore?
TIA,
BenO
P.S. Is there a standard port I should assign, or is 8888 as good a choice 
as any?