KDE unable to start after CPU upgrade

Hi to all,

I would apreciate if someone could help me...
I'm using Kubuntu 10.04 LTS and I have recently upgraded my CPU from AMD Athlon 3800 to AMD Phenom II 925.After that,and despite the fact that the system recognizes the CPU, system hangs at splash screen.If I click, I get the message:

"The following installation problem was detected while trying to start KDE.No write access to '/home/thiseas/.ICE Authority.KDE unable to start"

And if I click OK I get another message:

"Could not start KSM server. check your installation"

I have already tried to solve the problem according to 82771 and I get the output:

"-rw------- 1 root root 0 2011-12-26 15:42 /home/thiseas/.ICEauthority"

Could someone help me please?