BCH刀箱HS22刀片，RHEL 5.9系统，M2070Q显卡驱动安装问题

BCH刀箱HS22刀片，RHEL 5.9系统，M2070Q显卡驱动，安装顺利在system--->preferences--->NVIDIA X Server Settings中出现“You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server.”
求指教，这是什么问题，执行过nvidia-xconfig，重启X server，依然如此