I'm having the same problem reported here... http://www.igniterealtime.org/community/message/158523
Now, I'm new here (using openfire about a year) and recently I've installed the MSN gateway.
The XMPP bot works great with the jabber accounts, but has issues with that same problem reported above. The auth doesn't reach the MSN client.
This issue is 3 months old. Is there a fix for it ? Can I get a "nightly build" for it ? Because, as it is right now, it's not functional at all as nobody can add the bot (except the jabber accounts). :-/

Thanks