about kubuntu 8.10 beta

[césar beleño d.]

Hi, I recently installed kubuntu 8.10 beta in my  computer from internet.
Previously I had ubuntu 8.04 and I had downloaded some applications from KDE
such as kile and k3b, but these applications was not working. This were the
mean reason for I decided install kubuntu, but any sesion is not opening, I
cannot start neither kde sesion nor gnome sesion, I only can open gnome
failure mode. In the screen appear a message about *COULD NOT START
KSTARTUPCONFIG. CHEC YOUR INSTALLATION. Please help to solve this problem.

Thanks.
*
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César Beleño De la Barrera