i have wdr4300

and today I tried to change IP user interface to 192.168.1.2 from 192.168.1.1

and i read in openwrt website

What I need to do is edit the network file in etc/config
link to Where I read it
http://wiki.openwrt.org/doc/uci

I changed and now I can not login and cost me a user interface

help my Please SOS