sipxUnInitialize does not unregister from Asterisk.

[SipXRookie]

Hi,

I am playing around with the sample apps, both sipXezphone and wxCommunicator. In both the apps, on Application exit calls sipxUninitialize() method. But when this is called, the sip extension is not unregistered from the server (I am using Asterisk).

Can anybody throw some light on this?

Thanks!