I just downloaded the Gentoo Live-CD ,, 1.4.

I just downloaded the Gentoo Live-CD ,, 1.4.
And when i have done:
ifconfig eth0 192.168.0.51 broadcast 192.168.0.255 netmask 255.255.255.0
and
route add -net default gw 192.168.0.1 netmask 0.0.0.0 metric 1
and i try to ping another computer in the network.
I get no answear!...
I got a RealTek 8139card