Why won't the door open (Trying a new method)?

This is a new method from the last script. It still won't work. How can I fix it?

Thanks :)

t = script.Parent.Parent.Door2

function onKeyDown(key)
	if (key~=nil) then
		key = key:lower()
			if (key=="e") then
				t.BodyVelocity.velocity = Vector3.new(3, 0, 0)
				wait (3)
				t.BodyVelocity.velocity = Vector3.new(-3, 0, 0)
			end
	  end
end

t.KeyDown:connect(onKeyDown)

Your problem is that you're trying to use the KeyDown event on an Instance, when it is an event of the mouse.

To fix this, first start by putting this in a LocalScript, because the mouse can only be accessed from a localscript.

Now you should get the player using the LocalPlayer. Then get their mouse, then use the KeyDown event on it.. and finally move the part.

local t = script.Parent.Parent.Door2
local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()
local keyy = 'e' --key to press

mouse.KeyDown:connect(function(key)
	if key:lower() == keyy:lower() then --check the key
		t.BodyVelocity.velocity = Vector3.new(3, 0, 0)
		wait (3)
		t.BodyVelocity.velocity = Vector3.new(-3, 0, 0)
	end
end

I suggest you also look into using a global Debounce, with a boolvalue. For multiple player servers.

This should be a LocalScript in somewhere client-sided e.g. StarterGui, StarterPack.