Hello! The door insulation is not working in version 6.9, the isolation of active ports for level 1 (isolated) do logout mikrotik when it is back again at 0 (promiscuous).
(google translator) 
Try rephrasing your question please
isolation port does not work
isolation switch port does not work, I change the option but to leave the mikrotik
back to promiscuous
[youtube]http://www.youtube.com/watch?v=80BepzVxbsA&feature=youtu.be[/youtube]