Can't start CardDAV server on Centos 5

[guy@…]

Rev: 4957..

Using carddavd-test.plist

# ./run

Using python as Python

Starting server... exec python /root/Twisted/bin/twistd -n carddav -f /root/ContactServer2/conf/carddavd-dev.plist -o ProcessType=Combined Traceback (most recent call last):

File "/root/Twisted/bin/twistd", line 21, in <module>

run()

File "/root/Twisted/twisted/scripts/twistd.py", line 27, in run

app.run(runApp, ServerOptions)

File "/root/Twisted/twisted/application/app.py", line 374, in run

config.parseOptions()

File "/root/Twisted/twisted/application/app.py", line 354, in parseOptions

usage.Options.parseOptions(self, options)

File "/root/Twisted/twisted/python/usage.py", line 184, in parseOptions

for (cmd, short, parser, doc) in self.subCommands:

File "/root/Twisted/twisted/application/app.py", line 365, in subCommands

self.loadedPlugins[plug.tapname] = plug

File "/root/ContactServer2/twisted/plugins/carddav.py", line 13, in getProperty

return getattr(reflect.namedClass(self.serviceMakerClass), propname)

File "/root/Twisted/twisted/python/reflect.py", line 347, in namedObject

module = namedModule(string.join(classSplit[:-1], '.'))

File "/root/Twisted/twisted/python/reflect.py", line 335, in namedModule

topLevel = import(name)

File "/root/ContactServer2/addressbookserver/tap/carddav.py", line 71, in <module>

from twistedcaldav.resource import CalDAVResource

File "/root/ContactServer2/twistedcaldav/resource.py", line 42, in <module>

from twisted.web2.dav.idav import IDAVPrincipalCollectionResource

ImportError: cannot import name IDAVPrincipalCollectionResource