Error message while running a reputation scan

While running a reputation scan (T– just on the C drive), I got an error message in few seconds, which was:
“Trust Level, Prevalence, Resource Usage, and Stability reported for files may not be accurate because Norton Insight cannot connect to the Symantec Server. Please ensure that your computer is connected to the Internet for up-to-date results.”
It is mentionable that I have an internet connection. Now I need a solution to this problem.
Please provide me with a solution if there is any.
