Check for Port In Use

When clicking the Start button on the server, check the Status Log - if there were no errors you should see a status showing 'Server is now listening for connections...'. If the application was not able to open a listening port on the port and IP address specified in the Host and Port text boxes, you will see an error status like 'Server failed to listen for connections with error'.

If you get an error and the server was unable to listen on the specified port, this likely means that the Port and Host combination is already in use (another application is listening on it).

Windows include the ability to see what IPs and ports are currently in use - please search for how to use the netstat utility from a command prompt to see this information.