package "zope-plone3" can't install because irresoluble depencencies

[Alex]

In Ubuntu 9.10 Karmic Koala, the package "zope-plone3" can't install because of irresoluble depencencies

zope-plone3:
 Depende: zope2.10 pero no va a ser instalado
 Depende: zope-externaleditor pero no va a ser instalado
 Recomienda: zope-linguaplone pero no va a ser instalado
 Recomienda: zope-cachefu pero no va a ser instalado

ProblemType: Bug
Architecture: amd64
Date: Thu May 6 10:46:21 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: zope-plone3 (not installed)
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-21.59-generic
SourcePackage: plone3
Uname: Linux 2.6.31-21-generic x86_64