Thank you very much for the suggestion.
I downloaded the driver in src.rpm files from NVIDIA website this morning, deleted the old driver rpm, rebuilt and installed the new rpm, then recompiled suma again, and I finally saw suma's window. Suma is very cool!
I think my problem is the version numbers of NVIDIA_kernel driver and GLX driver did not match to each other before. And the most important step is rebuilding the driver from source, instead of installing from rpm directly (that's what I did before).
Lydia
