I am running into an issue when trying to run Calendar Server for the first time. I ran ./run -s without issue and the setup script was able to download and install the require modules. However, after completing the steps in the README when I run ./run to start the server I get the following output. I am on a RHEL 4 box that has cPanel. I have installed my own copy of Python 2.6 at /opt/python. Python 2.4 is installed with cPanel and I did not want to overwrite that. Thanks for your help. _Brendan [root@server1 CalendarServer]# ./run exec python /root/calserver/Twisted/bin/twistd -n caldav -f /root/ calserver/CalendarServer/conf/caldavd-dev.plist -o ProcessType=Combined /root/calserver/zope.interface-3.3.0/build/lib.linux-i686-2.6/zope/ interface/interface.py:196: RuntimeWarning: Python C API version mismatch for module _zope_interface_coptimizations: This Python has API version 1012, module _zope_interface_coptimizations has version 1013. import _zope_interface_coptimizations Traceback (most recent call last): File "/root/calserver/Twisted/bin/twistd", line 20, in ? from twisted.scripts.twistd import run File "/root/calserver/Twisted/twisted/__init__.py", line 19, in ? from zope.interface import Interface File "/root/calserver/zope.interface-3.3.0/build/lib.linux-i686-2.6/ zope/interface/__init__.py", line 58, in ? _wire() File "/root/calserver/zope.interface-3.3.0/build/lib.linux-i686-2.6/ zope/interface/interface.py", line 809, in _wire classImplements(Attribute, IAttribute) File "/root/calserver/zope.interface-3.3.0/build/lib.linux-i686-2.6/ zope/interface/declarations.py", line 461, in classImplements spec = implementedBy(cls) TypeError: zope.declarations.Implements is not a type