Mw2 Hosting problems?

Hello, I was wondering how I am able to use the features in this trainer/unlocker http://www.mpgh.net/forum/191-call-d...1-2-208-a.html. Everytime I try using the "Force Host" Or anything of that type, I get no results, I try putting it on before the game result: Can't find a game. Also putting it on in the middle of a game: Won't give me host or do anything.

U want force host use "mw2 liberation"

U cant do that stuff anymore. The owner of alteriw and mw2 has found some way to block those sorts of programs