the openSuSE ATI 4650 driver problem

Hi,
I am a newer of openSuSE,when I install openSuSE 11.3 by default ,I can get in X,but after a little time ,the X become a flower screen . First , I think that is the drive of ATI open source . So, I use this code (sh ./ati.run --buildpkg --SuSE/SUSE113-IA32)to install the drive 10.9 by AMD.And the flower screen never come again , the new problem is that , they work very slowly , you can’t move the window.
Is anyone can help me ?
Many thanks!