Issue with XIFF2 and rosters

I’m having a problem where I’m unable to see the nicknames of the active participants of a chat room. I’m using XIFF2 and Openfire 3.4.5.

I’m using a data grid to display the roster. If I look through what’s returned from a user join or departure event this is what I see: devRoom participant none null false null [object Object] true [object Object]
eventObject.type: userJoin
eventObject.nickname: undefined

Here is the code for creating the Roster:

var chatRoom = new Room( connection );
chatRoom.roomName = "devRoom";
chatRoom.nickname = "foobar";
chatRoom.conferenceServer = ""; chatRoomRoster.dataProvider = chatRoom;

Any guidance would be greatly appreciated.