GTK+ application application

nome
Hi!
Actually i have mini2440 .i am using 12inch LCD with X11 base system.i have
compiled my system with on buildroot also i have compiled my GTK+ base
application its working fine.when i launch my application.screen shown
approximately 7" only ...i have also check gtk-demo apps it also to be
showing 7".

1.i have check my kernel FB from DirectFB example.
2.Another i have check my X11 server its work fine cursor move whole 12"
area of the screen.
3.when gtk-demo apps i am launching its working fine...but shown only 7"
screen......
4.i want to see gtk apps in my whole 12" screen ........



plz give me solution as soon as possible......  soory for bad english...