Is your controller wired and LG on your laptop unwired? Can you ping your laptop LG from controller when LG is connected to LAN wirelessly? Please also try the IP assigned in wireless network instead of host name.
If ping is ok, try following: Since Controller is attempting to connect LG on TCP port 54345, you can also use telnet command line to see if that port is reachable: 1. Open cmd on Controller 2. Type in "telnet <your_LG_ip> 54345" to see if it's connected (a black console w/o any text)
If telnet can't connect to the target port, then it might be a firewall between wireless network and your wired LAN blocks certain ports, in that case, you'd better contact IT admin for help.