I now nothing about software, but is it safe to assume that you programmed the DEC talk groups also? They do need to be programmed because the dispatchers and units talk to each other via the talk groups. Also, let's see if you're picking up the control channel, which is necessary in order to monitor it. When the scanner is in scan mode, does it scan right thru the system or does it does stop briefly on a frequency, and then resume scanning again? If the system is programmed correctly, and you are within receiving range, when it reaches the system it will stop briefly on a frequency, which would be the control channel frequency, and then resume scanning again. If it doesn't do this, and just scans right thru the system without stopping, it's either not programmed correctly or you are too far away to pick up the control channel, and if you can't pick up the control channel, you can't monitor the system.