Please check the telnet on 8014 port for commanication between client and server.
1. Go to client machine.
2. Click on RUN.
3. Type CMD.
4. Type telnet (Space) server IP Address (Space) 8014.
5. Click Enter.
if there show blank windows your client communicate on your serever.And if your client is showing message on your command prompet (please open the 8014 port on both side to communicate client and server) then your client will show online on your server.