FilteringEnabled: TCP is not a valid member of player?

Whats supposed to happen is you click a button, it fires an event to the server which will then open the doors on the right hand side.

When I click the button it says "TCP isn't a valid member of Player"

eventScript:

function OpenDoor(door,num)
    local left = door.Left:GetChildren()
    for n=1, #left do
        if left[n].ClassName == "Part" then
            left[n].Mesh.Offset = Vector3.new(-0.1*num, 0, 0)
            if num == 36 then
                left[n].CanCollide = false
            end
        end
    end
    local right = door.Right:GetChildren()
    for b=1, #right do
        if right[b].ClassName == "Part" then
            right[b].Mesh.Offset = Vector3.new(0.1*num, 0, 0)
            if num == 36 then
                right[b].CanCollide = false
            end
        end
    end
    end

script.openRightDoors.OnServerEvent:connect(function(TrainVal)
    if TrainVal.TCP.Dir.Value == false then
        for a=1, 36 do
            OpenDoor(TrainVal.Car1.Door3,a)
            OpenDoor(TrainVal.Car1.Door4,a)
            OpenDoor(TrainVal.Car2.Door3,a)
            OpenDoor(TrainVal.Car2.Door4,a)
            wait(.01)
        end
    else
        for a=1, 36 do
            OpenDoor(TrainVal.Car1.Door1,a)
            OpenDoor(TrainVal.Car1.Door2,a)
            OpenDoor(TrainVal.Car2.Door1,a)
            OpenDoor(TrainVal.Car2.Door2,a)
            wait(.01)
        end

Button:

TrainVal = script.Parent.Parent.Parent.Train.Value

function onClick()
    game.Workspace.traineventScript.openRightDoors:FireServer(TrainVal)
end
script.Parent.MouseButton1Click:connect(onClick)