How to enable BackingStore on openSUSE 12.1


I am a new user of openSUSE 12.1. One of my remote applications asks me to enable BackingStore on my Server. I tried to follow some suggestion by changing the /etc/X11/xorg.config.install by adding Option “BackingStore” “on” to all “Device” Sections but Still does not work. Can you please help me to know how to enable the BackingStore for this version.
Thanks in advance