zabber, you are taling about login to Admin Console, but libx is talking about Spark. Read the announcement on the forums main page about 3.6.4 login bug after a setup. Yo ushould restart Openfire after a setup and only then login, and you should only use ‘admin’ as a username.
libx, the first error is not related i think, in 2.5.8 version something is messed up and it asks for windows dlls on linux. I think in current code this problem is gone. As about connecting to jabber.org, i can’t say what is wrong. Have you tried with other clients?