Compile new kernel in Fedora 5

Hi All,
I try to compile new kernel in FC5.

New kernel version - 2.6.20.21
Operating System - Fedora 5

I have followed these steps,

make menuconfig
make
make modules
make modules_install
make install

Then i have changed the grub.cong and reboot the system with new kernel.

The system has rebooted. But eth0 not detected..

ifconfig command displays only - lo details.

I feel , i have missed something..

How resolve this problem..

Regards
Vivek