Why won't this Anti-Virus script work?

Can someone tell me why this Anti-Virus script won't work?

function Scan(Model)
    local Virus = 0
    for _,i in pairs (Model:GetChildren()) do
        if not i:IsA("Model") then
            if script.Database:FindFirstChild(i.Name) then
                if script.Database:FindFirstChild(i.Name).Value == i.className then
                    i:Destroy()
                    Virus = Virus + 1
                    print("Viruses found: "..Virus)
                end
            end
        else
            Scan(i)
        end
    end
end

Scan(game.Workspace)

game.Workspace.ChildAdded:connect(function()
    Scan(game.Workspace)
end)