Hi people, I have a litle problem....

I have some problems with my Ubuntu....

When I try to play some Mp3 Music, it says that i don't have the codecs... but, when I try to install it, see what happen... :

andrea@andrea-desktop:~$ sudo apt-get install gstreamer0.10-pitfdll gstreamer0.10-ffmpeg gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-multiverse gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-multiverse gxine libxine-main1 libxine-extracodecs ogle ogle-gui
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias      
Leyendo información de estado... Hecho
E: No se pudo encontrar el paquete gstreamer0.10-pitfdll
andrea@andrea-desktop:~$



I think that my problem could be on my sources.list: this is the whole file:


deb http://archive.ubuntu.com/ubuntu/ edgy main restricted
deb-src http://archive.ubuntu.com/ubuntu/ edgy main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu/ edgy-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu/ edgy-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
 deb http://cr.archive.ubuntu.com/ubuntu/ edgy universe
 deb-src http://cr.archive.ubuntu.com/ubuntu/ edgy universe

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
 deb http://cr.archive.ubuntu.com/ubuntu/ edgy-backports main restricted universe multiverse
 deb-src http://cr.archive.ubuntu.com/ubuntu/ edgy-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu edgy-security main restricted
deb-src http://security.ubuntu.com/ubuntu edgy-security main restricted
 deb http://security.ubuntu.com/ubuntu edgy-security universe
 deb-src http://security.ubuntu.com/ubuntu edgy-security universe



Is there some addres that i should add or erase, or something like that??'



Thanks!!!