Homeworld 2 patch 1.1 problem

[morpheus_mhs]

I try to install patch 1.1 but when arrive ay file Homeworld2.big an error appare..... "Old file not found, or don't match"
why?
i don't have changed that file....
PLEASE HELP ME!:confused:

[ash2dust2]

Remove.
Re-install.
Patch.