cannot change to "kde" after installation of debian 6.0.6
I just finished installing debian 6.0.6 and tried to install kde but got following message:
root@Pascaru:/home/parents# cd /root
root@Pascaru:~# apt-get install kde
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package kde is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'kde' has no installation candidate
previous version of debian (6) didn't have this problem. what should I do next?