It is also possible that the NI news server only allows connections from e.g. US IPs. Are you coming from a foreign address? It will be more efficient if you use a local server anyway.
According to your screenshot, you are also using a local news server (narad.cc.iitk.ac.in). If this is the official news server of your ISP, try the following: (1) See if they carry the newsgroup "com.lang.labview", they might. (2) If they don't carry it, call customer support and ask them to add it. Most likely they will grant your request since it is a relatively low-volume news group.
