Make sure that for the alarm section you use a compatible audio file format such as MP3 or WAV because if you employ something which isn't supported, you will hear nothing like it actually happens. On the other hand, restore the software to its default settings and then configure the program and the alarm once more. Time and schedule the alarm to go off in a short time to check the results.
If this approach doesn't work, then please perform a new installation of the software because in most of the cases, there could be something messed up in the registry files.
