can not install the package eclipse (unresolvable dependencies)

[Lödur]

Binary package hint: synaptic

At the gnome panel
o Click on "System", choose "Administration" and click on "Synaptic Package Manager"

o type in my password and press [Enter]

At "Synaptic Package Manager"-dialog
o Click on the edit-field of "Quick search", type in the following
eclipse
o Click on the package "eclipse" and click on "Mark for installation"

Mark additional required changes?
o Click on the button [Mark]

Error message
---
Could not mark all packages for installation or upgrade

The following packages have unresolvable dependencies.
Make sure that all required repositories are added and
enabled in the preferences.

eclipse:
 Depends: eclipse-jdt but it is not going to be installed
 Depends: eclipse-pde but it is not going to be installed
 Depends: eclipse-source but it is not going to be installed
 Recommends: eclipse-gcj but it is not going to be installed
---

I can only click on the button [Close]

ProblemType: Bug
Architecture: i386
Date: Sat Sep 12 22:39:26 2009
DistroRelease: Ubuntu 9.10
Package: synaptic 0.62.7ubuntu3
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.32-generic
SourcePackage: synaptic
Uname: Linux 2.6.31-10-generic i686

[nosorog (neddih)]

Duplicate of bug #401402 which has Confirmed status.