Are you using software for it? If so, what software?
Do you have VIPER programmed in? That is what 99% of the city & county is using. There is a new digital system that the PRO106 cannot decode, but I don't believe it will be used for another few months.
First advice would be to turn the scanner on. Press TUNE. Punch in 868.3750. Press ENTER. See if you're decoding the control channel. If nothing on that frequency, try 867.9875 instead. This will ensure you're able to receive the Greenville VIPER site. Once we confirm that, we'll go from there.