I purchased a BCD436HP and love the simplicity of using Sentinel to drag and drop the systems. All of the trunked systems I dropped into my new favorites work great. However, I've had a couple of problems (probably my fault) of which I will only mention one at this time and seek recomendations. I created 4 conventional systems (HAM, CB, FRS & GMRS) modeled after the Sentinel systems. I dragged a HAM system straight to a Favorite named HAM. When I turn these favorites on to monitor, it says, "nothing to scan". I can't figure our why it will not acknowledge these frequencies and scan them. Please help.