So nobody can help me?
Support don't work on forum? Should I write directly to support?
Either not many other forum members have same problem as you do or the herd of people that did have same problems and solved them didn't see your post.
Since this is more or less user forum, not support channel, it'd be best if you contacted Mikrotik at firstname.lastname@example.org
. I'm pretty sure though that their first request will be that you should upgrade your RB to latest "long term" ROS, which is 6.42.10 (your version is pretty old). That includes both ROS and firmware upgrade.