I recently purchased a V1 and have some questions. When I got it Sat., I took it out for a test run and it alarm pretty shortly after. A city cop was sitting on the shoulder with a lot of door sensors near by. Yesterday I assed a Kentucky State Police officer and the V1 never alerted. I was doing 68 in a 55 and he never gave chase so I assumed that he wasn't running his radar. This morning on my way in to work a county deputy passsed in front of me and the same thing no alarm. Do you think there is something wrong with my unit? It was bought second hand and has 3.683 software loaded on it.