You need to troubleshoot the connection options first. Check the hostname (ping it to see if it's alive), the port your're connecting to (usually this belongs to the protocol you're using - SSH, Telnet, FTP, SFTP, etc), and other routes or firewalls.
If you have a firewall installed in your PC, add NCT-2000-XP to the exclusion list to avoid filtering. Also, I strongly recommend choosing PuTTY over any terminal application out there primarily because it's very simple, compatible with 99 % of all the servers available on the Internet and more.