Can't seem to get my Slingbox to work while I'm in London. Set up the 500 at home in Chicago before I left and it was working fine with my iMac there. Now whenever I try to log on and watch the Slingbox it just times out and says that there is an error connecting. Are there settings that I need to adjust? The wifi signal I am working with is fine and other devices, and netflix, are working just perfectly. I'm dumbfounded that this is not working and could use some troubleshooting help. Thanks.