AvastNet.log on the client says this (in case it’s helpful):
12/05/2011, 14:19:07 avast! NetService identified as prom-6
12/05/2011, 14:19:37 Server didn’t respond in time! Trying to wait a little longer.
12/05/2011, 14:20:07 Server didn’t respond in time! Will Restart NetPump.