I just got my very first scanner and of course have a question (one of many). After playing with as many buttons as I could get to work over the weekend I decided to reset (inintialize) my radio. Now when I press the scan button it says ALL CHANNELS LOCKED OUT! What does this mean? Before restting this button used to perform a full scan of all frequencies. This was a refurbished unit and I suspect that the previous owner had something programmed into it that I was unaware of. What do we do?