How to use "Idle Connections Policy"

Hello,

I have an problem for Idle Connections Policy.

I create a client under android using smack, I found that when the phone lost the network, smack can detect the disconnection.

But at server, openfire always show that the connection is on line.

For Idle Connections Policy, I have change to

Disconnect clients after they have been idle for1 seconds.

Openfire can send an XMPP Ping request to clients that are idle, before they are disconnected. Clients must respond to such a request, which allows Openfire to determine if the client connection has indeed been lost. The XMPP specification requires all clients to respond to request. If a client does not support the XMPP Ping request, it must return an error (which in itself is a response too).

But it has no effective.

The version of openfire is 3.9.3

Anyone can help me?

Thanks