My question is how to configure OpenFire to force clients to use XMPP MUC over IRC when the IRC transport is enabled.  When I enable IRC for my clients they all get the error "No Response From Server" when they try to create an ad-hock conference.  I turned debug logging on and the issue appears to happen when clients are not registered with IRC.  Disabling IRC solved the issue.  Is this behavior by design?

I am using OpenFire 3.4.2 and Spark 2.5.8.  I confirmed this behavior with OpenFire 3.4.1 as well. 

Here are the relavent logs:

2007.12.10 09:15:23 Received iq packet: &lt;iq id="NQ71J-98" to="jtaylor_a1a@conference.irc.chat.xxxxx.edu" type="get" from="jtaylor@chat.xxxxx.edu/spark"&gt;&lt;query xmlns="http://jabber.org/protocol/disco#info"/></iq>

2007.12.10 09:15:23 irc: Sending packet: &lt;iq type="error" id="NQ71J-98" from="jtaylor_a1a@conference.irc.chat.xxxxx.edu" to="jtaylor@chat.xxxxx.edu/spark"&gt;&lt;error code="403" type="auth"&gt;&lt;forbidden xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/&gt;&lt;/error&gt;&lt;/iq&gt;

2007.12.10 09:15:23 Received presence packet: &lt;presence id="NQ71J-99" to="jtaylor_a1a@conference.irc.chat.xxxxx.edu/Jonathon Taylor" from="jtaylor@chat.xxxxx.edu/spark"&gt;&lt;x xmlns="http://jabber.org/protocol/muc"/></presence>

2007.12.10 09:15:23 Unable to find session.

2007.12.10 09:15:23 irc: Sending packet: &lt;message type="error" to="jtaylor@chat.xxxxx.edu/spark" from="conference.irc.chat.xxxxx.edu"&gt;&lt;error code="503" type="cancel"&gt;&lt;service-unavailable xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/&gt;&lt;/error&gt;&lt;body&gt;You are not currently logged into the IRC transport.&lt;/body&gt;&lt;/message&gt;