Unable to join Conference

I am the admin on my Openfire Server and I have created a group chat room which I have also assigned the account which I use Spark on to be the owner of the room. When I log onto Spark I can see the room from the conference tab, but when ever I try to join it I get disconnected from Spark completely. I have group chat enabled in my Openfire settings.

Here is a copy of the logs from Spark

SEVERE: Could not stop flashing because null

java.lang.NullPointerException

at org.jivesoftware.spark.PresenceManager.getPresence(PresenceManager.java:97)

at org.jivesoftware.spark.decorator.DefaultTabHandler.isTabHandled(DefaultTabHandl er.java:52)

at org.jivesoftware.spark.ChatManager.notifySparkTabHandlers(ChatManager.java:780)

at org.jivesoftware.spark.ui.ChatContainer$15.run(ChatContainer.java:985)

at java.awt.event.InvocationEvent.dispatch(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

Jul 16, 2008 10:09:33 AM org.jivesoftware.spark.util.log.Log error

SEVERE: Could not stop flashing because null

java.lang.NullPointerException

at org.jivesoftware.spark.PresenceManager.getPresence(PresenceManager.java:97)

at org.jivesoftware.spark.decorator.DefaultTabHandler.isTabHandled(DefaultTabHandl er.java:52)

at org.jivesoftware.spark.ChatManager.notifySparkTabHandlers(ChatManager.java:780)

at org.jivesoftware.spark.ui.ChatContainer$15.run(ChatContainer.java:985)

at java.awt.event.InvocationEvent.dispatch(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

Any suggestions?