Fixed Thanks
Code:
public fw_TakeDamage(victim, inflictor, attacker, Float:damage)
{
if(get_pcvar_num(knife_on))
{
if(is_valid_player(attacker) && get_user_weapon(attacker) == CSW_KNIFE && knife_model[attacker])
{
SetHamParamFloat(4, damage + knife_model[attacker])
return PLUGIN_HANDLED;
}
}
}