Gears Of War 3

so i used horizon to mod my gears of war 3. i gave myself camos and rank and medals. standard stuff. but when i started my gears of war 3 up evrything was there but one thing. matchmaking. it says no one is online at all and i have all dlcs, so if i hit standard it had private game modes showing up. its seems to be running on like version 1 of the game before DLC’s came out. Any fix’s?