Solaris 9 Ethernet Card Problems

I keeping plumbing my ethernet card and assigning it an IP address and netmask, but after I reboot it keeps losing this information. Can anyone help me solve this problem?
I am using the command:
ifconfig hme0 plumb <IP Address> netmask <Subnet Mask> broadcast + up
I am running Solaris 9 OS.

Create a file for hme0:

echo "xxx.xxx.xxx.xxx" > /etc/hostname.hme0
(replace the xxx.xxx.xxx.xxx with your IP address)

Then insure you have the /etc/defaultrouter set up - you should be able to get this info from your Network folks if you don't know. It could be as simple as this: If your IP is 10.140.16.20 then your default router may be 10.140.16.1 or 10.140.16.254. It matters on how your network is set up.

Insure your netmask is in /etc/netmasks. Again, get with your network folks for the info.

I believe that's it.

Thanks alot. That solved my problem.