Help with the public killhack please!

I was alone with a friend in a horror mode room.

Then i press like 4 5 1 2 and then f8 but nothing happens

can somebody tell my why f8 suddently doesnt work?

PLEASE!

i dont think its works on horror

it works perfecly just keep playing with it ! 1 top dont press the hotkeys at the same time

no listen look i press numpad 4 then i press f8 and i kill someone then i wanto give someone else kills but if i press 5 i kill my self and then i press 4 again and it wont work i really dont get it please help.