Hi Dal,
it might be due to bug in that version or system issue..
please try to download latest version of cipc..
if you cucm support jabber try to sue jabber as it will give same functionality as cipc giving...
and it might resolve your issue...
also you can check on your desktop on which youa re running cipc if required any uprgeade of window or any setting that blocking your sounds of other applications..
i am using same and not faced any issue...
Warm Regard's
Amit Sahrma