KDE Installation with 2.4.18

[Tom Kloppel]

I upgraded my kernel to 2.4.18 and I added the KDE source to my
sources.list, did an update, and apt ignored it...  All that i can install
is kde 2.x.,  but i want 3.1.2.  Am I doing something wrong or am i going to
have to install by source since i upgraded the kernel? (please no.....)