为何不能加载agpgart！安不了ati显卡

kensouxp2003

为了安装ati显卡好象要加载agpgart，可是我用insmod加载不了。提示：
Using /lib/modules/2.4.20-8/kernel/drivers/char/agp/agpgart.o
/lib/modules/2.4.20-8/kernel/drivers/char/agp/agpgart.o: init_module: No such device
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters.
      You may find more information in syslog or the output from dmesg
我是完全安装RH9，请高手指点一下啊。感激！！！！