Why is it not freezing the player or thawing as well as banning?

I can kill players but I can't ice,thaw or ban them? No errors No nothing just does not work

Admins = {"johndeer2233", "doodmen123", "Player", "Player1"}
Banned = {}
prefix = "/"
function kill(target)
    if game.Players:FindFirstChild(target) then
        if game.Players:FindFirstChild(target).Character.Humanoid then
            game.Players:FindFirstChild(target).Character.Humanoid.Health = 0 
        end
    end
end

function ice(target)
    if game.Players:FindFirstChild(target) then
        if game.Players:FindFirstChild(target).Character.Torso then
            game.Players:FindFirstChild(target).Character.Torso.Anchored = true
        elseif game.Players:FindFirstChild(target).Character.LowerTorso then
            game.Players:FindFirstChild(target).Character.LowerTorso.Anchored = true
        end
    end
end

function thaw(target)
    if game.Players:FindFirstChild(target) then
        if game.Players:FindFirstChild(target).Character.Torso then
            game.Players:FindFirstChild(target).Character.Torso.Anchored = false
        elseif game.Players:FindFirstChild(target).Character.LowerTorso then
            game.Players:FindFirstChild(target).Character.LowerTorso.Anchored = false
        end
    end
end

function ban(target)
    if game.Players:FindFirstChild(target) then
        game.Players:FindFirstChild(target):Kick()
        table.insert(Banned,target)
    end
end
game.Players.PlayerAdded:connect(function(plr)
    for i,v in pairs(Banned) do
        if v == plr.Name then
            game.Players:FindFirstChild(v):Kick()
        end
    end
    plr.Chatted:connect(function(msg)
        for i, v in pairs(Admins) do
            if plr.Name == v then
                if msg:sub(1,5):lower() == prefix.."kill" then
                    kill(msg:sub(6))
                end
                if msg:sub(1,5):lower() == prefix.."ice" then
                    ice(msg:sub(6))
                end
                if msg:sub(1,5):lower() == prefix.."thaw" then
                    thaw(msg:sub(6))
                end
                if msg:sub(1,5):lower() == prefix.."ban" then
                    ban(msg:sub(6))
                end
            end
        end
    end)
end)