Problem to upgrade from 11.04 to 11.10

[frealgagu]

This is the message log (appears when its trying configure new software channels):

An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generó cortes, esto puede haber sido causado por paquetes retenidos.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

Si ninguna de estas aplica, entonces informe de este fallo usando la orden «ubuntu-bug update-manager» en una terminal.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.5.4
ProcVersionSignature: Ubuntu 2.6.38-16.67-generic 2.6.38.8
Uname: Linux 2.6.38-16-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Mon Nov 12 11:14:26 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=oneiric
 /apps/update-manager/first_run=false
 /apps/update-manager/show_details=true
 /apps/update-manager/window_size=(600,600)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=es_CO:en
 LANG=es_CO.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2012-11-12 (0 days ago)
VarLogDistupgradeApttermlog:

VarLogDistupgradeHistorylog:

VarLogDistupgradeTermlog:

[dino99 (9d9)]

That version is no more maintained