eth0 nw interface problem

[Navin SONI]

hello all,

i recently installed RH9.0 on my new HP-Proliant DL145G2 Server.

But the system eth0 interface is not coming up.if i do 

ifconfig -a command,only lo0 interface comes up.

i tried doing ifconfig eth0 up also,but it says no such device.

the network card is "Broadcom Netxtreme ethernet BCM5721"


Any help in this regard would be apprecible.

thanks
navin.