External Component Pubsub problem

I’m developing an external component.
But when it tries to create a pubsub node, openfire will reply to it after 60 seconds.

After 60 seconds…

In the case of xmpp client, this problem does not happen.
I saw the following discussion: http://community.igniterealtime.org/message/204515#204515
But, I cannot solve it.

Does anyone know the solution?

Thanks in advance for any help.

Openfire: 3.7.1
OS: Windows7 64bit