how to change KDE ?

[pirat]

Hi people.

I was changed(install from synoptic) grafic interface to KDE 4.1, but old KDE 3.5 did not removed
After boot I have an interface:

Help me please remove old KDE 3.5 and leave only KDE 4.1.

[Archangel-Amael]

Well we really don't support people who do such things.
I would suggest trying apt-get purge kde (or whatever exact name you used here).
Failing your inability to accomplish this then just start over.
See also the forum faq section for more info.