The client 6.0.3 is installed, it starts stably and normally, after a while simply writes that "the server is not connected," in the applet log file write the following:
[03/16/17 14:45:49] [api] network error for http : //10.204.20.99: 8000 / api2 / ping /: Connection closed
After restarting it starts normally, after a while everything repeats. Server 6.0.8. With what it can be connected?