There is no Solution

hey guys im new im here to show me problem

look when i playing cross fire message appears say 255220_3 and this make the game freeze but im moving after 10 sec messager appeared im cant move then if waited it make me get out of the map to the list of players at room then message it says it me dissconnected from server then it make me go to servers lists when i try enter any server after loading say to me dissconected from server i cant play zombie mode one time i was killing the boss in crater i was close my score was above 700000 but message say 255220_3 made me out
please i want to play zombie without errors i cant play hero mode with 17 round its happening alot if i want get a boss crate i search for game under 24 wave and i wait and wait until one die and i join from wave 24 and sometimes i complete and sometimes no {This is insulting huh

}yesterday i just killed the boss of crater 5 times for the first time in my life and i got wargomer fist please i need you really help i searched for Solution in everywhere but i didnt fint how to fix this problem I registered in MPGH to find here the Solution but i couldnt find it i posted that error with piciture 2 times but no one no one can slove my problem i will pleased and thanked for who can slove my problem