[Xymon] BBWin in centralized mode

I recently converted a few Windows boxes over to centralized collecting mode. Now the application log in those machines is being filled up with messages like this:

BBWin failed to send the client data successfuly to the hobbit server. The error was : Can't receive query answer : An existing connection was forcibly closed by the remote host..

every time BBWin sends data to my Xymon server. Has anybody else seen this? Any recommendations as how to stop this? This is with BBWin 0.12 clients and Xymon 4.3.3 for the server.

Thanks, Larry Barber