[Zope] ZEO or INSTANCE_HOME Problem

Hi; I'm building a new Zope server with ZEO and INSTANCE_HOME and I've run into this problem when trying to start it: #./zctl.py start -v Stopping ZEO pid: 4604 4605 sh: kill: (4604) - No such pid sh: kill: (4605) - No such pid Starting ZEO server on 5800 "/usr/local/bin/python" /home/httpd/ZopeInstallation/Zope_software_home/lib/python/ZEO/start.py -p 5800 & waiting for ZEO server to start 1/200 'import site' failed; use -v for traceback Traceback (most recent call last): File "/home/httpd/ZopeInstallation/Zope_software_home/lib/python/ZEO/start.py", line 91, in ? import sys, os, getopt, string ImportError: No module named os No module named os?? Huh? What have I screwed up? TIA, BenO