I used an Asante' Router. I have other PC running Windows 98 (in the same LAN), and it is able to grab an IP from in DSL Router.
Before, after I installed that this Linux on the same PC, I could get on internet automatically and working fine. Then I wiped out my HardDrive and re-installed same linux again, but this time ran out of luck.
My NIC Card: 3Com.

Thanks in advance.