Notification Script giving error?

I'm Trying to code the base to a notification system right now but i keep getting this error

http://imgur.com/a/yxGph

This is the Script that is handling the Notification Animation/Positioning/Creation

while true do
    wait()
    if game.Workspace.Remote.OnServerEvent then
        Notification = script.Parent.Notification:Clone()
        Notification.Parent = script.Parent.Parent
        if script.Parent.Queue.Value >0 then
            Notification.Position.Y = Notification.Postion.Y + (-105*script.Parent.Queue.Value)
        end
        Notification:TweenPosition(UDim2.new(0,0,0, (-105*script.Parent.Queue)), "Out", "Sine", 1, false)
    end
end

I have also included some screenshots hoping that'll help.