connecting to a server

[caraloca]

Hi; my daughter likes to play NEXUS (is a virtual chat world). But it can not get connect to the server. I already wrote to the thecnical people from that site but they does not what to do.
I have a firewall (sygate personnel firewall) and I already allowed the nexus program to go out, I also closed the firewall and still nothing, we tried the NEXUS software in my neighboor's pc and he can connect.
I also unistalled and install the program but no luck.
Before This site was closed for several months we could connect very easy, now that is back we can't.
any ideas?
maybe if I get the ip address of the site, can I configure my firewall to connect to the server?. if yes how can I know the ip address, using my neighboor's pc?
Or maybe is a problem with ports. how can I know which port is nexus using to connect?
Thank you for your help and time