netstat -lnp | grep 4445
That command will tell you WHO is using port 4445. If you see its perl, then you have fop1 using that port and you have to change /var/www/html/panel/op_server.cfg and set "listen_port=4446" and finally restart fop1 (killall op_server.pl).
However, if the output from the command is fop2_server, then the daemon is already running and you should be able to login.
