Hi I just purchased a sds100 and bought the upgrade key for NXDN, I programmed it off radio reference to Sentinel for businesses and law enforcement in my area using it. My question is when I'm on NXDN my scanner searches sites when it locks in it shows red light and channel name id and stuff but I don't hear anything, it stops on a channel but hear no talking is it something I haven't done or what..seems like I should hear way more talking..please help me. Or tell me how to download it right..thanks