Hook PlayerCanPickupWeapons "not working"

[Seccoboy]

I'm new to LUA and i dont know much about hooks...
Im working on a Power Round called "Nemesis" in it basically there must be a player randomly selected with an m249, lots of life and infinite ammo...
Almost everything is ready, the only problem is that I can not make Hook "PlayerCanPickupWeapons" work...
I've already tried it in several ways but I could not make it work...
Here are a few attempts ...

  -- function PlayerCanPickupWeapon(Ply, wep)
-- if Ply:GetRole() == ROLE_DETECTIVE then
-- return (wep:GetClass() == "weapon_zm_sledge") end
-- hook.Add("PlayerCanPickupWeapon")
-- end

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  -- hook.Add("PlayerCanPickupWeapon", function(Ply,wep)
-- if Ply:GetRole() == ROLE_DETECTIVE and wep:GetClass() ~= "weapon_zm_sledge" then return false end
-- end )
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-- Hooks["PlayerCanPickupWeapon"] = function( Ply, wep )
-- if Ply:GetRole() == ROLE_DETECTIVE and wep:GetClass() ~= "weapon_zm_sledge" then return false end
-- end
But no one is working... Can someone help me?

[TheEMP]

Check out hook.Add on the wiki as your using it wrong.

https://wiki.garrysmod.com/page/hook/Add

[Seccoboy]

Yeah, thank you! It worked!