Hello blog!Finaly, these morning i had successfully upgrade and recompiled my kernel from 2.6.18.5 to 2.6.20. I need 4-5 times to recompiled until this run stabil and compatible with other applications. There is some different between 2.6.18.5 kernel vs 2.6.20. I found it when test my firewall aplication (kmyfirewall) that use iptables as based. It error and cannot run. There is different name, like modules for NAT. I have found nice suggestion from linuxquestions.org for you that want upgrade from previous kernel, just try 'make oldconfig'. So all the modules were properly built.