Iv read all tutorials and have tryed everything,even map packs wont work,iv tryed a united map pack V1.1 and the new independenant map pack and i do everything and load it to the hdd and all and when i start up hal0 2 and click my name thing it says files corrupted and somthin els And i go to all the multiplkayer maps and all the modded maps are there but whenn i try playing it,it dosent load and sighns me out and brings me back to mainmenu...can sombody help me out? (could it be xbl update?)