Just wanted to give an update that i tried this fix
http://community.learningequality.org/t/kolibri-v0-10-has-been-released/716/3
but nothing improved.
I also tried to determine how many concurrent user can be served.
What i found is if there is less than 10 devices, everything works.
Then with 15 devices it is workable with delays.
But when tried to connect 20 or more devices everything falls apart.