@pe1chl
I want to be clear and precise: I am not saying that this is your error in any way.
By the way, as you can see, I also tried it personally on the RB5009, and it seemed to work… Until I turned it back on day after when I read the problem on forum…
What I was referring to is written here,
http://forum.mikrotik.com/t/v7-19-1-stable-is-released/183849/1
and is for this: (now fixed)
http://forum.mikrotik.com/t/netinstall-on-rm3011-fails-need-help-technical-questions/183302/1
but it is difficult to blame the users or the forum,
also because none of us have put a direct link for the download of the file,
but to the help section where everything is explained…
and to find the right link you still had to search the document and read what is written…
And everything was well written even before MikroTik added the text a little.