Make sure that you have the latest gui version to work with your AX. Also it would be helpful if you provided the reason given by the gui for not connecting and some of your setup.
Finally, what do you mean by the ports? Are you talking about firewall? If so, it is my suggestion that you always open all ports to/from the quintum to start. Make sure that you are able to make calls, connect, etc., then start closing down ports and test calls and such after you close down each group of ports.