I could really use some help.. I bought a radio shack pro-18 off this forum and received it today, I'm having a problem figuring it out.. when I go to do anything, it shows database files not found on SD card, please reinstall SEL=Continue..when I select that choice, it goes back to main menu.. I'm new to this , I thought you could just enter zip code on this scanner.. do I have to download it or something ? It's like the database was deleted or something like that..any help is appreciated ..Thanks Rick