How to get notice for the disconnected user immediately.

[pop2518]

Now, it seem that there are some delay after a user disconnected and the disconnect event firing to the system extension. This cause a lot of problem since the user may connect once again before the disconnect event firing to the extension.

[Bax]

Which amount of delay are you referring to?
Because in case of socket connection, the disconnection is notified immediately (connection lag apart, of course).
Maybe the issue happens when connected via BlueBox?