Status "connecting" in the Setup Manager program means that the virtual com port's PC driver is trying to connect to the RC-1216H. If "Remote serial TCP port" under "Serial settings" in the RC-1216H is the same as the port entered in Setup Manager, as well as the IP address/host name being correct, then there is something stopping the PC from being able to connect to the RC-1216H. Is the RC-1216H behind a firewall? If so, have you forwarded the port to the RC-1216H?