Is fop2_server running? try "pgrep fop2_server" If fop2_server is running then check that port 4445 is open. One probable cause is that you have fop1 running and listening on port 4445, and when you try to start fop2 it silently fails because it is not able to bind to the same port. If so, you have to disable fop1 or change its listen port by editing op_server.cfg.
Regards,
