If you evented it to give you ten points, then download
Gravity Cat's Advanced Score system.
If you already have that, then I can't help you.
Also, Tier Tactical 2 with the reserve ammo system, like the .880 rounds and stuff, doesn't work with Gamemode Zombie.
The reserve ammo system conflicts with Gamemode Zombie's ammo system and you can't pick up ammo.
If you have Tier Tactical 1, then you are good.