I cant install ati driver on kernel 2.6.18-rc4

[clamber]

I just compiled and install the kernel 2.6.18-rc4(My laptop is dell inspiron, I can suspend my machine only on 2.6.18). I run the ati-driver-installer-8.27.10-x86.run, but after rebooting Ifound that the dirver is not installed correctly
######################
X-Video Extension version 2.2
screen #0
no adaptors present
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ATi drivers just not support the new kernel or I have made some mistakes when I configure the kernel ?

anybody has installed successfully?

Thanks

[clamber]

Here are the info I found in the log

[Message] Kernel Module : Trying to install a precompiled kernel module.
[Message] Kernel Module : Precompiled kernel module version mismatched.
[Message] Kernel Module : Found kernel module build environment, generating kernel module now.
ATI module generator V 2.0
==========================
initializing...
Error:
kernel includes at /lib/modules/2.6.18-rc4/build/include do not match current kernel.
they are versioned as ""
instead of "2.6.18-rc4".
you might need to adjust your symlinks:
- /usr/include
- /usr/src/linux
[Error] Kernel Module : Failed to compile kernel module - please consult readme.


what should I do?
thanx