SMART TV "Network Interference Occurred.Try Again Later."

Thanks for the responses to my post.

I decided to connect my SMART TV by wire on 24th June and am pleased to confirm that I have had no problems since doing so. All of the HUB functionality is now working perfectly.

For information, I installed firmware release T-GASDEUC-1011.1 prior to going wired but I have no idea whether this is of any relevance to my original problem. Could the contents of this release have resolved my previous difficulties?

John