[Zope] ZEO Install Problem

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?