I got a Radio Shack Pro-97 scanner. I've programmed in all the frequencies for the Delaware State Police for New Castle County but yet I'm hearing the data channel but get no audio. I can see the system identity at the bottom of the scanner. Any clue what I'm doing wrong. I've setup the scanner to work with other trunked systems in the county but I'm only having problems when setting up the Delaware State police trunk system. Any help would be greatly apprieciated.