I've tried allowing all network activity for most of my applications. I even tried creating rules from the process activity page, allowing all network activity. Try creating a low-level system rule to allow all http-out, but I have a feeling that even that is not going to work. Of course, I don't want you to keep that rule if it does work. It's only a test. I don't have Outpost installed at this time to try it myself. I'm sure that you already have a rule for javaw.