Zombie Hack help!!

Ok..Look wats the problem.So I came there I login enabled hack.Everything going well so .. enter into a zombie-Biohazard server. I tried to shoot in zombies but the hack did not work .. Is there any key to activate it? help me!

Do you shoot them and it does like 0 damage? if so your wepon dosent work with 1 hit so try a few of the different guns out to make sure it works (;

I use a Steyr Aug.. I need to use a M16?

You can use almost every weapon just try