Hi Madinvestor
these are the alarm setting you should see about the input , or even alter them and when news is released it'ding' an alarm.
If it's not that then ensure your other sounds about the mt4 platform are working, if they are then sorry I understand exactly what the matter is different than to fully uninstall then re-install cal 108a, other calendars may result in conflicts even the prior 107 so be sure all are flashed.... The cache is cleared by And also at the bottom of the inputs tab on 108a.
regards
Phil.