j’ai changé mes sources-list de miroirs ca pour us sur mon ordi principal (( avec Kde wheezy )) … 
deb cdrom:[Debian GNU/Linux 7.3.0 Wheezy - Official i386 kde-CD Binary-1 20$
deb cdrom:[Debian GNU/Linux 7.3.0 Wheezy - Official i386 kde-CD Binary-1 2013$
deb ftp3.nrc.ca/debian/ wheezy main contrib non-free
deb-src ftp3.nrc.ca/debian/ wheezy main contrib non-free
deb security.debian.org/ wheezy/updates main contrib non-free
deb-src security.debian.org/ wheezy/updates main contrib non-free
wheezy-updates, previously known as ‘volatile’
deb ftp3.nrc.ca/debian/ wheezy-updates main
deb-src ftp3.nrc.ca/debian/ wheezy-updates main
pour :
deb cdrom:[Debian GNU/Linux 7.3.0 Wheezy - Official i386 kde-CD Binary-1 20$
deb cdrom:[Debian GNU/Linux 7.3.0 Wheezy - Official i386 kde-CD Binary-1 2013$
deb ftp.us.debian.org/debian wheezy main contrib non-free
deb-src ftp.us.debian.org/debian wheezy main contrib non-free
deb security.debian.org/ wheezy/updates main contrib non-free
deb-src security.debian.org/ wheezy/updates main contrib non-free
wheezy-updates, previously known as ‘volatile’
deb ftp.us.debian.org/debian wheezy-updates main contrib non-free
deb-src ftp.us.debian.org/debian wheezy-updates main contrib non-free
fait mes updates … et cela fonctionne très bien maintenant …
merci de votre aide … 
Résolu … 