Okay I live in lakeland fl, and currently we have this event going on called sun in fun fly in, its a big airshow, i would love to listen to the ground crew and security for the show, so while i was walking around i glanced at one of the security persons radio, by the way it was a regular 2 way motorola radio, the channel said 10 and then it had the security channel set at 20. So I go get my 2 way radio and set it to the exact same channel but i can't hear anything and nothing seems to be active on the channel, what could be the problem?