After 19 days I had though you had resolved the issue and not a what next .....? boy you have a very slow connection
Does Sygate allow access to Web Shield (ashWebSv.exe)?
What have you tried, before saying what next?
Since it has been so long since the start of the thread, what version of avast are you using, the current version is 4.6.652?
Since this would appear to be a firewall blocking issue have you been received any automatic VPS updates?