Repository ignored

Need a bit of help.

Currently I use Ubuntu NBR (10.4 Lucid Lynx) and I am trying to upgrade 
to KDE-PIM 4.6 and KMail2.  I have added the following to my sources.list:
deb http://ppa.launchpad.net/kubuntu-ppa/experimental/ubuntu/ lucid main

Unfortunately, whenever I do a sudo apt-get update, the repository is 
ignored.  At least that's what I think IGN means in the following output.

Anyone know how to force the use of a repository?

Mark
-- 
Hit http://mirrors.cs.wmich.edu lucid Release.gpg
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid/main Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid/restricted Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid/universe Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid/multiverse Translation-en_US
Get:1 http://mirrors.cs.wmich.edu lucid-updates Release.gpg [198B]
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-updates/main Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-updates/restricted 
Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-updates/universe 
Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-updates/multiverse 
Translation-en_US
Hit http://download.virtualbox.org lucid Release.gpg
Get:2 http://mirrors.cs.wmich.edu lucid-security Release.gpg [198B]
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-security/main 
Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-security/restricted 
Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-security/universe 
Translation-en_US
Ign http://mirrors.cs.wmich.edu/ubuntu/ lucid-security/multiverse 
Translation-en_US
Hit http://mirrors.cs.wmich.edu lucid Release
Get:3 http://mirrors.cs.wmich.edu lucid-updates Release [44.7kB]
Get:4 http://us.archive.ubuntu.com lucid-backports Release.gpg [198B]
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-backports/main 
Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-backports/restricted 
Translation-en_US
Get:5 http://archive.canonical.com lucid Release.gpg [198B]
Ign http://archive.canonical.com/ubuntu/ lucid/partner Translation-en_US
Ign http://download.virtualbox.org/virtualbox/debian/ lucid/contrib 
Translation-en_US
Hit http://ppa.launchpad.net lucid Release.gpg
/***  Repository ignored here ****
Ign http://ppa.launchpad.net/kubuntu-ppa/experimental/ubuntu/ lucid/main 
Translation-en_US
Hit http://ppa.launchpad.net lucid Release.gpg
Hit http://debian.scribus.net lucid Release.gpg
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-backports/universe 
Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-backports/multiverse 
Translation-en_US
Ign http://ppa.launchpad.net/byobu/ppa/ubuntu/ lucid/main Translation-en_US
Hit http://ppa.launchpad.net lucid Release.gpg
Ign http://ppa.launchpad.net/canonical-dx-team/une/ubuntu/ lucid/main 
Translation-en_US
Hit http://ppa.launchpad.net lucid Release.gpg
Ign http://ppa.launchpad.net/kevin-mehall/pithos-daily/ubuntu/ 
lucid/main Translation-en_US
Hit http://download.virtualbox.org lucid Release
Hit http://ppa.launchpad.net lucid Release.gpg
Ign http://ppa.launchpad.net/libreoffice/ppa/ubuntu/ lucid/main 
Translation-en_US
Get:6 http://archive.canonical.com lucid Release [8,215B]
Hit http://ppa.launchpad.net lucid Release.gpg
Ign http://ppa.launchpad.net/llyzs/ppa/ubuntu/ lucid/main Translation-en_US
Hit http://ppa.launchpad.net lucid Release.gpg
Get:7 http://us.archive.ubuntu.com lucid-backports Release [38.5kB]
Ign http://debian.scribus.net/debian/ lucid/main Translation-en_US
Ign http://ppa.launchpad.net/mozillateam/firefox-stable/ubuntu/ 
lucid/main Translation-en_US
Get:8 http://ppa.launchpad.net lucid Release.gpg [316B]
Ign http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/ lucid/main 
Translation-en_US
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://download.virtualbox.org lucid/contrib Packages
Hit http://debian.scribus.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Get:9 http://ppa.launchpad.net lucid Release [14.0kB]
Hit http://ppa.launchpad.net lucid/main Packages
Hit http://ppa.launchpad.net lucid/main Packages
Get:10 http://archive.canonical.com lucid/partner Packages [13.4kB]
Hit http://ppa.launchpad.net lucid/main Packages
Hit http://ppa.launchpad.net lucid/main Packages
Get:11 http://mirrors.cs.wmich.edu lucid-security Release [44.7kB]
Get:12 http://archive.canonical.com lucid/partner Sources [6,590B]
Hit http://debian.scribus.net lucid/main Packages
Hit http://ppa.launchpad.net lucid/main Packages
Hit http://ppa.launchpad.net lucid/main Packages
Hit http://ppa.launchpad.net lucid/main Packages
Get:13 http://ppa.launchpad.net lucid/main Packages [3,873B]
Get:14 http://us.archive.ubuntu.com lucid-backports/main Packages [12.6kB]
Hit http://mirrors.cs.wmich.edu lucid/main Packages
Hit http://mirrors.cs.wmich.edu lucid/restricted Packages
Hit http://mirrors.cs.wmich.edu lucid/main Sources
Hit http://mirrors.cs.wmich.edu lucid/restricted Sources
Hit http://mirrors.cs.wmich.edu lucid/universe Packages
Hit http://mirrors.cs.wmich.edu lucid/universe Sources
Hit http://mirrors.cs.wmich.edu lucid/multiverse Packages
Hit http://mirrors.cs.wmich.edu lucid/multiverse Sources
Get:15 http://mirrors.cs.wmich.edu lucid-updates/main Packages [502kB]
Get:16 http://us.archive.ubuntu.com lucid-backports/restricted Packages 
[14B]
Get:17 http://us.archive.ubuntu.com lucid-backports/universe Packages 
[37.8kB]
Get:18 http://us.archive.ubuntu.com lucid-backports/multiverse Packages 
[1,378B]
Get:19 http://us.archive.ubuntu.com lucid-backports/main Sources [7,004B]
Get:20 http://us.archive.ubuntu.com lucid-backports/restricted Sources [14B]
Get:21 http://us.archive.ubuntu.com lucid-backports/universe Sources 
[15.3kB]
Get:22 http://us.archive.ubuntu.com lucid-backports/multiverse Sources 
[1,633B]
Get:23 http://mirrors.cs.wmich.edu lucid-updates/restricted Packages 
[3,240B]
Get:24 http://mirrors.cs.wmich.edu lucid-updates/main Sources [194kB]
Get:25 http://mirrors.cs.wmich.edu lucid-updates/restricted Sources [1,443B]
Get:26 http://mirrors.cs.wmich.edu lucid-updates/universe Packages [202kB]
Get:27 http://mirrors.cs.wmich.edu lucid-updates/universe Sources [74.4kB]
Get:28 http://mirrors.cs.wmich.edu lucid-updates/multiverse Packages 
[10.5kB]
Get:29 http://mirrors.cs.wmich.edu lucid-updates/multiverse Sources [5,061B]
Get:30 http://mirrors.cs.wmich.edu lucid-security/main Packages [194kB]
Get:31 http://mirrors.cs.wmich.edu lucid-security/restricted Packages [14B]
Get:32 http://mirrors.cs.wmich.edu lucid-security/main Sources [58.2kB]
Get:33 http://mirrors.cs.wmich.edu lucid-security/restricted Sources [14B]
Get:34 http://mirrors.cs.wmich.edu lucid-security/universe Packages [70.7kB]
Get:35 http://mirrors.cs.wmich.edu lucid-security/universe Sources [20.9kB]
Get:36 http://mirrors.cs.wmich.edu lucid-security/multiverse Packages 
[4,555B]
Get:37 http://mirrors.cs.wmich.edu lucid-security/multiverse Sources 
[1,745B]
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