I just installed AG 2.3 on Windows XP (no SP2) and imported my certificate. When I start the Venue Client and click the "GO" button, I get an error immediately:
Can not connect to venue located at https://vv2.mcs.anl.gov:90000/Venues/default. Please, try again. I checked with Ethereal, and it is not sending any requests at all. Does anyone know of a solution to this problem? Thanks.

