Delta Pro-2000 how to enable audible arm

Hi there, I have a Delta Pro-2000 2-way alarm with the 4-button remote.  Recently it stopped giving me the audible arm/disarm.  At first I thought the siren was fried but I set it off with the panic feature.  I've tried disconnecting the battery for a half hour to see if the alarm would reset itself to factory settings but that didn't work.  It looks like Delta isn't around anymore(at least not on the web) and the shop that I purchased/installed from isn't around anymore.  Does anyone know the procedure for turning the audible arm back on?  Any help would be appreciated!  Thanks.

Ok... I found a solution for this... in case anyone has the same problem.  I actually ran into someone that use to work at the alarm place I got my alarm installed.  Power on and press 2 on the remote.  The mystery is solved!