washington county md

Purchased a Uniden handheld BCD325P2 the other day and either I'm programming it wrong or the frequencies I'm using are out of date for Washington County... Anyone know who I can go to that can program this bad boy for me? Or perhaps has newer frequencies that I can try that arent deprecated?

Dumb question, but why would Washington County MD's TRS run on UHF frequencies, 450 mHz, rather than 700/800 mHz? I suppose they might get better coverage, but that kinda messes up that whole interop thing. Does anyone have any insight into why they went this direction with their system...