I'm in Rolling Fork Mississippi. Sharkey County. I'm only interested in Rolling Fork and maybe Greenville Mississippi
OK. I am not from you area, so this may prompt someone to clarify.
Sharkey County, show Rolling Fork on 45.42. Your scanner should have no trouble getting that
Washington County shows Greenville on an 800 trunking system, which your scanner can not receive. However, even if you got a scanner that could get it, you are probably too far away to receive it.
Now the sheriff is on a digital system, which your scanner can not receive, but you did not mention wanting to hear them.
Make sure you have the Rolling Fork frequency above, and let us know if still have problems.