downgrade os ??

hi all
i want to downgrade my MT RB 333 from router OS 3rc13 to 2.9.50 .
so is it possible to downgrade?
in MT website in download 300 series 2.9.50 OS its not available.
so from where i get 2.9.50 version?

plz anyone try it before suggest me.

thanx
james

RB333 supports only ROS 3.xx and above. You cannot downgrade below version 3.

thnak u dear