I have a Pro 97 scanner. I have been trying to use the Signal Stalker feature with out any success. I have talked with Radio Shack but all they wanted to know is if I needed any batteries. I have fequencies loaded in and I have no difficulty in receiving them. But even if I stand next to emergency vehicles / fire station .... I can't get it to land on anything in Sig. Stalker mode, it just scans and scans. Can anybody help with a suggestion?