I have a BCD-396xt, and i'am trying to get an update for it, I seen one advertised by uniden for it but when attempting to try and install it into the radio nothing happens, acts as though no downloads come through or i'am just doing something wrong, kinda new to the new digital scanner stuff, and computer interface hook up, like said I have the hook up cable from uniden but nothing seems to be cooperating with install, HELP for an old scanner guy out there?