DC Agent keeps losing connection

I am running Triton USC build 7.8.0.43 and Web Security build 7.8.1.1485.

It seems that every day now, I check the System tab and see that Websense is not able to communicate with the DC Agent on port 30600 or whichever.

I check and the DC Agent service IS running.  However, the Alert still appears.  I restart the service, and after a minute or so, I check and reload the System tab, and I then get No Problems Detected.

What can I check that would cause this to 'lose communication' seemingly every night?  What troubleshooting can I do to resolve this?

Thank you!

Michael R.