Greetings!
One thing to check, assuming you haven't, is the Profile your using; check all the settings and options under that Profile to make sure something isn't set to mute. There are so many options for In Holster and Out of Holster. I had a similar problem where the setting for the DC was set to Mute when In Holster; hence, I couldn't heard any DC alerts!!! Just a thought...
God Bless!
Rick
Embrace His Grace