setting ipaddr is not persistant

i waant to change ip from my board micro2440 235MiB .

when i type the command on linux 2.6.32.2 ifconfig eth0 xxx.xxx.xxx.xxx
the ip is changed but when i reboot linux the ip is allways 192.168.1.230.

how can i do for the ip no change when i reboot linux ?

thank in advance.

Think it is a configuration file in etc/init.d 
networking?

Sorry, haven't got the board running and I am off to work.

Good luck

is ok

it is in file /etc/eth0-setting

thanks