An older lady helps out at my local fire house has the model of scanner. Our county recently updated its frequencies so she asked me to program it for her. I went and put all of the new frequencies in (all conventional UHF/VHF/Low Band until our county goes UHF Digital) and when I go to scan the frequencies it clicks/gets stuck on our Fire/EMS Dispatch (453.4125), Med 9 (462.950) and Med 9 Reverse (467.950) I've cleared the memory and reentered the frequencies and I still have the issue. It has a AC power cord (set to the correct voltage) What could be the issue???