Local script if statement doesn't work?

So, I have an if statement that checks if the player has a key, and if the player doesn't have it, it plays a sound. But I have the key and the door doesn't open. The script is also a local script.

game.Players.LocalPlayer.CharacterAdded:Wait()
local Door = workspace.Door.MyBigPPpart
local d = false
local TweenService = game:GetService("TweenService")

Door.ProximityPrompt.Triggered:Connect(function(player)
    if not d then
        d = true
        local anim = player.Character.Humanoid:LoadAnimation(script.Pickup)
        anim:Play()
        if not player.Backpack:FindFirstChild("Door1Key") or not player.Character:FindFirstChild("Door1Key") then
            Door.Lock:Play()
        elseif player.Backpack:FindFirstChild("Door1Key") or player.Character:FindFirstChild("Door1Key") then
            local info = TweenInfo.new(
                1,
                Enum.EasingStyle.Linear,
                Enum.EasingDirection.In,
                0,
                false,
                0
            )

            local goals = {
                Position = Vector3.new(470.108, -19.667, 1597.603);
                Orientation = Vector3.new(0, 90, 0)
            }

            local ts = TweenService:Create(Door.Parent.Door1, info, goals)
            ts:Play()

            local info1 = TweenInfo.new(
                1,
                Enum.EasingStyle.Linear,
                Enum.EasingDirection.In,
                0,
                false,
                0
            )

            local goals1 = {
                Position = Vector3.new(481.541, -19.667, 1597.603);
                Orientation = Vector3.new(0, -90, 0)
            }

            local ts1 = TweenService:Create(Door.Parent.Door2, info1, goals1)
            ts1:Play()
            Door.Open:Play()
        end
        wait(1)
        d = false
    end
end)