Mw2 Liberation PLEASE HELP

I just downloaded mw2 liberation 1.00 to use with my steam version of the game. when I downloaded the file, I ran Liberation then clicked "load game"
Every time I wait a little or load a private match i get this error code "Unable to communicate with Modern Warfare 2 Liberation Module. Please allow access and try again" Am I missing a patch or file for liberation? or is it something to do with steam? all I downloaded was the files the were in the liberation folder, nothing else.

STILL NOT WORKING ): I downloaded 1.6 ran it, and the same error came up. Any further help would be appreciated.