I've got sparkweb up, and I've got openfire up.
When I assign a default conference room for users to join they are presented with the "room window", and they may type in it, but they are alone. Other users do not see them, they only see themselves, and their content only shows up in their own window.
Possibly related: creating a conference room doesn't work either.
If I make a conference room called "DR", and user A and user B both join the room (as both users may see it), the same behavior happens. Users can both be in the same "conference" but they cannot see any users nor do their chats reach each other.
Users may IM each other this part works correctly.