I went to KDE forum and ask the Question to many days ago still can get no answer from them.
But I went another web side ask the same question and make a good friend there I told him I will give 2 more days and I will reinstall it.

Okay serious stuff now is when I installed Suse11.1 I upadted to kde4.13 after that I add few repositories and update to 4.2.x.
At that time I upgrade Nvidia to 180.29 and kde4.2.x at the same time,when I log out or restart my computer and went back to KDE4 my screen is blank/black.

Please is there one of you can give me hand and solved the problem.

Thank you for all in the past for helping me out